The tool I thought would work to hold the shaft still doesn't fit into the holes on the pulley. I have some diagrams of tools people have made, but along with having to source all the stuff, I'm not sure I have the tools to do this effectively. If I put some bolts into the holes on the pulley and tried using a prybar wedged between them to counteract the wrench would I likely warp the pulley? Any other ideas?