Card Cart

This is an updated version of my other Card mover.
Changes:
-Added hinge to align the cards.
-Hinge auto-opens when HID Reader turns for eject.
-Stands contain holes for Arduino Nano holder and Stepper Driver
-Speedup of Slide by changing the ratio (we need more theeth :))
-Redesign Foot to keep all units in one to enable more stable design
-Added more holes to attach other things
-Redesigned the Card-Reservoir. can be stacked now if more than 50 cards are needed.

Hint: to attach the HID-Holder to the Servo, I had best success when heating up the Holder-Hole.
Then Push-fit the Holder to the servo and wait (when aligned) until it cools down. Finally attach the center screw, if the fit is tight but doesn't slip.
This can be repeated until you have good success.
It also makes sense to warm-up the SG90 holder clamps to prevent them from breaking.

The cable can be hot-melted into the guide on the bottom.
HID Reader USB cable should be Strap-tied to the HID-Holder, to allow