I purchased the pro hub tool last year. I have a very difficult time inserting a wheel on to it. It takes a great amount of pressure and twisting to get the wheel on and when its on you cant spin it. I also ordered the wheel shaver XT and had a very difficult time using the tools together. I watched all the you tube videos and mine don’t work that well. I even chucked it in a drill press and used 800 grit paper to sand it down. I don’t have the means to accurately turn down the shaft, so I did not want to go to far. Also I don’t think I should have to do this to a tool that is supposed to be a “Pro Tool”. Did I get a bad one? What diameter is the shaft to be? It doesn’t make a difference what side I use. I have tried about 8 to 10 sets of wheels and they are all about the same so im pretty sure that it’s the tool.