The plan is to use this Linear Rail design for almost all steps of the folding operation. We can easily change the length of the rail by cutting the V-slot, and using a shorter Ballscrew. The clear plastic piece is the standard base for the 3D printed box-interface-parts. Its removable from the cart with 4 bolts. The cart is built on a single 1/8 metal base plate that requires no bending. The plate that the stepper bolts to with the long brass stand off's is also flat 1/8 in metal with no bending. Meaning If we order a large batch form the machine shop it comes out to only a few dollars a piece if cut with high power laser. >=D we plan is order a large batch of these plates and sell the rail kit on Amazon for people who would like to make their own.

1x NEMA 17 steper

1x 250mm 8mm BallScrew

1x 250mm V-SLOT rail

4x V-slot Wheels kit

4x 40mm m3 standoffs

1x stepper ball screw coupler.

2x 1/8th plates

and all the hardware.
Thanks -Jake C