diff --git a/opencsp/app/camera_calibration/CameraCalibration.py b/opencsp/app/camera_calibration/CameraCalibration.py
index dbf8fc68a..7ccef597e 100644
--- a/opencsp/app/camera_calibration/CameraCalibration.py
+++ b/opencsp/app/camera_calibration/CameraCalibration.py
@@ -30,7 +30,7 @@ def __init__(self):
 
         """
         # Create tkinter object
-        self.root = tkt._window()
+        self.root = tkt.window()
 
         # Set title
         self.root.title('Camera Calibration')
@@ -276,7 +276,7 @@ def find_corners(self):
 
     def view_found_corners(self):
         # Create new window
-        root_corns = tkt._window(self.root, TopLevel=True)
+        root_corns = tkt.window(self.root, TopLevel=True)
 
         # Get number checkerboard points
         npts = self.get_npts()
diff --git a/opencsp/app/select_image_points/SelectImagePoints.py b/opencsp/app/select_image_points/SelectImagePoints.py
index 986c0f76d..f360a9385 100644
--- a/opencsp/app/select_image_points/SelectImagePoints.py
+++ b/opencsp/app/select_image_points/SelectImagePoints.py
@@ -202,5 +202,5 @@ def _load_raw_image(file) -> np.ndarray:
     )
     if file_selected != '':
         # Create window
-        win = SelectImagePoints(tkt._window(), file_selected)
+        win = SelectImagePoints(tkt.window(), file_selected)
         win.run()
diff --git a/opencsp/app/sofast/SofastGUI.py b/opencsp/app/sofast/SofastGUI.py
index b61d96ee8..41f1cdd53 100644
--- a/opencsp/app/sofast/SofastGUI.py
+++ b/opencsp/app/sofast/SofastGUI.py
@@ -36,7 +36,7 @@ def __init__(self) -> 'SofastGUI':
         self.service = SofastService(self)
 
         # Create tkinter object
-        self.root = tkt._window()
+        self.root = tkt.window()
 
         # Set title
         self.root.title('SOFAST')
@@ -515,7 +515,7 @@ def load_image_projection(self) -> None:
             # Load data
             image_projection_data = ImageProjection.load_from_hdf(file)
             # Create new window
-            projector_root = tkt._window(self.root, TopLevel=True)
+            projector_root = tkt.window(self.root, TopLevel=True)
             # Show window
             self.service.image_projection = ImageProjection(projector_root, image_projection_data)
 
diff --git a/opencsp/app/sofast/lib/AbstractMeasurementSofast.py b/opencsp/app/sofast/lib/AbstractMeasurementSofast.py
index 89b8c82ea..483c39083 100644
--- a/opencsp/app/sofast/lib/AbstractMeasurementSofast.py
+++ b/opencsp/app/sofast/lib/AbstractMeasurementSofast.py
@@ -1,14 +1,10 @@
 """Measurement class for SofastFringe
 """
 
-from abc import ABC, abstractmethod
+from abc import ABC
 import datetime as dt
 
-import numpy as np
-
-from opencsp.app.sofast.lib.ImageCalibrationAbstract import ImageCalibrationAbstract
 import opencsp.app.sofast.lib.DistanceOpticScreen as sod
-from opencsp.common.lib.geometry.Vxyz import Vxyz
 import opencsp.common.lib.tool.hdf5_tools as h5
 
 
diff --git a/opencsp/app/sofast/lib/DistanceOpticScreen.py b/opencsp/app/sofast/lib/DistanceOpticScreen.py
index 3d3f2b157..ea23b194d 100644
--- a/opencsp/app/sofast/lib/DistanceOpticScreen.py
+++ b/opencsp/app/sofast/lib/DistanceOpticScreen.py
@@ -7,17 +7,27 @@
 @dataclass
 class DistanceOpticScreen(h5.HDF5_IO_Abstract):
     """Represents a distance measurement between the optic and the center of the screen. This measurement is typically
-    achieved by displaying the crosshairs from the SofastGUI and measuring from the center of the optic
-    (measurement_point 0,0,0) to the center of the crosshairs."""
+    achieved by displaying the crosshairs from the SofastGUI and measuring from the origin of the optic
+    (measurement_point 0,0,0) to the center of the crosshairs.
 
-    v_measure_point_facet: Vxyz = field(default_factory=lambda: Vxyz(0.0, 0.0, 0.0))
+    The optic's origin is typically the center of the optic for on-axis optics, such as with spherical or flat mirrors
+    that are symetric around their midpoint."""
+
+    v_measure_point_facet: Vxyz = field(default_factory=lambda: Vxyz((0.0, 0.0, 0.0)))
     """ Location of measure point, meters. """
     dist_optic_screen: float = 0
     """ Optic-screen distance, meters. """
 
     def save_to_hdf(self, file: str, prefix: str) -> None:
-        """
-        Saves to HDF file
+        """Saves data to given file. Data is stored as: PREFIX + Folder/Field_1
+
+        Parameters
+        ----------
+        file : str
+            HDF file to save to
+        prefix : str, optional
+            Prefix to append to folder path within HDF file (folders must be separated by "/").
+            Default is empty string ''.
         """
         datasets = [prefix + '/v_measure_point_facet', prefix + '/dist_optic_screen']
         data = [self.v_measure_point_facet.data.squeeze(), self.dist_optic_screen]
@@ -27,9 +37,15 @@ def save_to_hdf(self, file: str, prefix: str) -> None:
 
     @classmethod
     def load_from_hdf(cls, file: str, prefix: str):
-        """
-        Loads from HDF file
+        """Loads data from given file. Assumes data is stored as: PREFIX + Folder/Field_1
 
+        Parameters
+        ----------
+        file : str
+            HDF file to load from
+        prefix : str, optional
+            Prefix to append to folder path within HDF file (folders must be separated by "/").
+            Default is empty string ''.
         """
         groups, file_names_and_shapes = h5.get_groups_and_datasets(file)
         file_names = [name for name, shape in file_names_and_shapes]
diff --git a/opencsp/app/sofast/lib/MeasurementSofastFixed.py b/opencsp/app/sofast/lib/MeasurementSofastFixed.py
index b6a611590..0263e507c 100644
--- a/opencsp/app/sofast/lib/MeasurementSofastFixed.py
+++ b/opencsp/app/sofast/lib/MeasurementSofastFixed.py
@@ -5,7 +5,6 @@
 import opencsp.app.sofast.lib.AbstractMeasurementSofast as ams
 import opencsp.app.sofast.lib.DistanceOpticScreen as osd
 from opencsp.common.lib.geometry.Vxy import Vxy
-from opencsp.common.lib.geometry.Vxyz import Vxyz
 import opencsp.common.lib.tool.hdf5_tools as hdf5_tools
 
 
@@ -28,10 +27,8 @@ def __init__(
         ----------
         image : np.ndarray
             (M, N) ndarray, measurement image
-        v_measure_point_facet : Vxyz
-            Location of measurem point on facet, meters
-        dist_optic_screen : float
-            Optic to screen distance, meters
+        dist_optic_screen_measure : DistanceOpticScreen
+            Measurement point on the optic, and distance from that point to the screen
         origin : Vxy
             The centroid of the origin dot, pixels
         date : datetime, optional
@@ -42,8 +39,6 @@ def __init__(
         super().__init__(dist_optic_screen_measure, date, name)
         self.image = image
         self.origin = origin
-        self.date = date
-        self.name = name
 
     @classmethod
     def load_from_hdf(cls, file: str, prefix='') -> 'MeasurementSofastFixed':
diff --git a/opencsp/app/sofast/lib/MeasurementSofastFringe.py b/opencsp/app/sofast/lib/MeasurementSofastFringe.py
index f1f89edd6..1ffe10a0a 100644
--- a/opencsp/app/sofast/lib/MeasurementSofastFringe.py
+++ b/opencsp/app/sofast/lib/MeasurementSofastFringe.py
@@ -8,7 +8,6 @@
 from opencsp.app.sofast.lib.ImageCalibrationAbstract import ImageCalibrationAbstract
 import opencsp.app.sofast.lib.AbstractMeasurementSofast as ams
 import opencsp.app.sofast.lib.DistanceOpticScreen as osd
-from opencsp.common.lib.geometry.Vxyz import Vxyz
 import opencsp.common.lib.tool.hdf5_tools as hdf5_tools
 
 
diff --git a/opencsp/common/lib/deflectometry/ImageProjection.py b/opencsp/common/lib/deflectometry/ImageProjection.py
index 648bd0cec..b3c07b258 100644
--- a/opencsp/common/lib/deflectometry/ImageProjection.py
+++ b/opencsp/common/lib/deflectometry/ImageProjection.py
@@ -127,7 +127,7 @@ def in_new_window(cls, display_data: dict):
 
         """
         # Create new tkinter window
-        root = tkt._window()
+        root = tkt.window()
         # Instantiate class
         return cls(root, display_data)
 
diff --git a/opencsp/common/lib/deflectometry/ImageProjectionSetupGUI.py b/opencsp/common/lib/deflectometry/ImageProjectionSetupGUI.py
index 8a603f59e..adb7c84de 100644
--- a/opencsp/common/lib/deflectometry/ImageProjectionSetupGUI.py
+++ b/opencsp/common/lib/deflectometry/ImageProjectionSetupGUI.py
@@ -81,7 +81,7 @@ def __init__(self):
         self.display_data: dict
 
         # Create tkinter object
-        self.root = tkt._window()
+        self.root = tkt.window()
 
         # Set title
         self.root.title('ImageProjection Setup')
@@ -202,7 +202,7 @@ def show_projector(self):
         self.update_window_size()
 
         # Create a new Toplevel window
-        projector_root = tkt._window(self.root, Toplevel=True)
+        projector_root = tkt.window(self.root, Toplevel=True)
         self.projector = ImageProjection(projector_root, self.display_data)
 
         # Activate buttons
diff --git a/opencsp/common/lib/tool/hdf5_tools.py b/opencsp/common/lib/tool/hdf5_tools.py
index 6a5fb1303..228664f98 100644
--- a/opencsp/common/lib/tool/hdf5_tools.py
+++ b/opencsp/common/lib/tool/hdf5_tools.py
@@ -271,7 +271,7 @@ def load_from_hdf(cls, file: str, prefix: str = ''):
         Parameters
         ----------
         file : str
-            HDF file to save to
+            HDF file to load from
         prefix : str, optional
             Prefix to append to folder path within HDF file (folders must be separated by "/").
             Default is empty string ''.
diff --git a/opencsp/common/lib/tool/tk_tools.py b/opencsp/common/lib/tool/tk_tools.py
index b3b5d0ca4..2bee986ba 100644
--- a/opencsp/common/lib/tool/tk_tools.py
+++ b/opencsp/common/lib/tool/tk_tools.py
@@ -37,7 +37,7 @@ def showtip(self, event=None):
         x += self.widget.winfo_rootx() + self.widget.winfo_width()
         y += self.widget.winfo_rooty() + self.widget.winfo_height()
         # Creates a toplevel window
-        self.tw = _window(self.widget, TopLevel=True)
+        self.tw = window(self.widget, TopLevel=True)
         # Leaves only the label and removes the app window
         self.tw.wm_overrideredirect(True)
         self.tw.wm_geometry(f"+{x:d}+{y:d}")
@@ -59,7 +59,7 @@ def hidetip(self):
             tw.destroy()
 
 
-def _window(*vargs, TopLevel=False, **kwargs):
+def window(*vargs, TopLevel=False, **kwargs):
     """Initializes and returns a new tkinter.Tk (or tkinter.TopLevel) instance.
 
     If creating the window fails, tries again (up to two more times).