About this 3D model

I made a spool holder for the 1Kg spools I get from ProtoParadigm. The spool wheels fit inside the spools and I put in bearings so it spins freely. It's set inside the brackets on a hex bolt (1/2" head). I built a little stand out of MicroRax 10mm extrusion to hold it. The spool wheels are different sized ... one large and one small since each side of the spools are different.