I have 5 bar cues I got through a trade of stuff that have been cut down. I thought it would be fun to try with very limited tools to try to put a pin on them mainly just to see if I can. There is one valley and the rest are Chinese so they are not high dollar cues even if converted by the best. My question is what should the diameter of the butt be were the joint is. Some of them are cut longer and some are shorter. Knowing this size will help me determine if I have a possibility or firewood.