The wedgies look like fake fingernails.
Oh and that little red thing in the pic of the "Axis Finder",
I believe is a bubble level.
Lets see
A motor, 2 pullys. 2 shafts, 4 rubber wheels, a belt,a bubble level and some 3/4" plywood. Looks like 1/2" shafts, might have some bearings for the shafts.
Darn I have to build this.