I have a homemade axle that is black iron pipe and the outside diameter is 1.9". It really gets on my nerves how loose my plates fit on this and the bar never rests properly when it just sits with weight on it. It will lean to one side or the other and the plates get loose all the time even when I am using a steel hose clamp tightened up against the weights. Any ideas on what I can use to make the sleeve area larger so my plates will have a tighter fit? I have tried some athletic tape on the ends but this just gets worn off after a few weeks of sliding weights on and off. Any ideas would be greatly appreciated.