I bought a few of these awhile ago from Turners Warehouse just to try. Now the bushing suggested on the sites is a 20A which is the basic sierra bushing. But I measured the kit and it is between the Sierra and Sierra Vista. Am I missing something so obvious that I am not seeing it. this happens when you get older so do not laugh. Now I can turn it easily with calipers and will probably have to do this but was wondering is there a seperate bushing for these or do they match up with any others that people would know?? I could start looking in the library chart but thought this might be quicker. I have see those kits shown here before so know people do make them. Thanks.