Tutorial.pdf, page 73, 4P cable

[virtadpt]

The 4P cable mentioned on this page isn't quite long enough to connect the ultrasonic ranging sensor to the interface board. The builder may have to replace it with a longer cable or modify it so that it is long enough. I had a couple of spare Dupont wires laying around, so I was able to use them as an extender so that the head would move correctly.

You might want to consider putting a longer version of the 4P cable in future releases of the kit.