5mm Shaft and ER11 Chuck for Ant PCB Maker

I was having trouble sourcing the tool shaft, bearings and motor specified in the original design so I modified the .stp files to use an ER11 chuck mounted on a 5mm shaft with the corresponding 5x16x5mm angular contact bearings. The bridge base has been altered to create more room for the larger chuck. The motor is an old 1000KV drone motor I had lying around which is clamped directly to the shaft. I also modified the shaft pulley to fit the 5mm shaft and collar and created a new motor pulley