1. The two frame_walls stand vertically, parallel to each other. 2. The base_plate connects the two walls at the bottom. 3. The receiving_bin sits on the base_plate, between the walls. 4. The top_plate_solid connects the walls at the top, after you use top_plate_hole to cut the opening for the cards. 5. The hopper sits on top of the top_plate, aligned over the hole. 6. You will need to drill your own holes in the side walls to mount the motor, rollers, and to secure top and bot