DIY drum sander components

I have been working on a DIY drum sander (as seen on YouTube: shttps://youtu.be/GgqINdJa9Ww). I decided that several of the components that were called to be made out of wood in the plans would be better done on my 3D printer! The items in this collection are the "plugs" (discs) that are inserted into Schedule 40 4" PVC pipe. I built in the "drive pin" holes and a captured 3/4" nut for the drive shaft.

I have a separate "mix" for the crank handle for the feed belt at: https://www.thingiv