I've tightened my share of scales on old razors and with the exception of a couple they were successfully done. OTOH, I have a few dubl ducks that are valuable with their original scales. The problem is that in tightening those they are good and tight when open in stropping or shaving position but become looser than I like when I go to close them. To where I have to be careful when closing them.

If they weren't original scales I would probably take my chances but I sure would hate to crack a Wonderedge scale or bend the pin trying to squeeze another millimeter out of it. Any thoughts, tips ?