I believe CAIMAG has the best, and most knowledgeable motor builders I have read on the web, so I'd like to get opinions on wrist pin buttons as opposed to metal clips. I have made buttons for a motor I am putting together. I made them to have a light finger press into the wrist pin hole, and piston bore. I used the plastic called UHMWP, or umpee as it is called in the automation business. Any opinions, or warnings would be most appreciated. Thanks.