25mm Conduit Polishing Jig

Needed a way to grip my 25mm conduit for sanding and polishing, that I am using for my MPCNC build (https://www.thingiverse.com/thing:790533). The conduits I bought from screwfix UK (https://www.screwfix.com/p/deta-class-4-conduit-tube-galvanised-25mm-x-3m/7442j) were pretty rough and made a lot of noise when the bearings rolled over them. Now the rods are nice and smooth.

I modified the original design to accommodate the M8 hex screws I had spare and added a few extra cut outs from the expa