Here is another problem I have run into. My lathe came with a few of the standard drive pins. 5/16-18-14,3/8-10,etc. I ordered more drive pins at $35 a pop, and i still needed more. I even bought joint protectors for some shafts. Amazingly I still get shafts, i don't have a drive pin for. Mcdermott has a shaft with a type of uniloc that nothing fits. There must be a hundred or more type of joints. What does anybody recommend????