I'm working on a modification for the VSlot version but don't own that printer. I need to know a measurement and if one of you get a chance I'd like to know the head diameter of the 1) round head hex on the left. And 2) the diameter of the hex nut (the long dimension, not the short one) and the diameter of the flat washer. Also, I'd like to know how far each sticks out off of the surface.