The lazy susan platforms allow the reels to rotate smoothly while the machine is running. It is raised up from the platform by the standoffs to allow for the shaft coupler. These instructions are for both platforms built in the previous step, so you will need to do everything twice.
1: Cut out the acrylic support disc using this file. If you do not have access to a laser cutter, a round shape is not necessary, just the holes.
2: Place 10-32 washers on top of each of the four holes and hold them in place with masking tape.
3. To make the shafts, you will need two 8mm steel shafts and 3mm x 3mm key stock. The key stock is cut into 2x 2.25" lengths and welded (by a local shop) onto the steel shafts approx. 1.5" from one end. Insert the short end of the shaft into the other end of the coupler and tighten.
4. Flip the acrylic plate over so that the washers meet up with the four standoffs on the platform. Line up the lazy susan bearing with the four holes and use 10-32 screws to tighten everything down. Also tighten the screws on the bottom of the platform. NOTE: the alignment of everything will be easier if you loosen the screws on the bottom of the platform attached to the standoffs so that they can wiggle around a bit. Once you have screws going into the standoff from both sides you can start tightening.