If I were going to ask for a change to the pegs, it would be for te cross hairs to be boxed in different shape for different diameter. This way one wouldn't have to call out the peg on the drawings. I looked at the code, but got lost in about 2.4 seconds.

Example - circle for 1", triangle for 3/4", square for ?".
A simple key on the drawing would decode this, and after a few frames it would be understood.

These would only show with the crosshairs, not the overall model.