I have a '78 Fender Jazz Bass and I have had constant problems with the height adjustment screws working themselves down as I play. It can take as little as one song to completely bottom the saddle out. I have replaced the saddle 4 times now with brand new saddles. The current bridge is a brand new Fender 70s Reissue. The replacement saddles have all been brand new Fender 70s RI saddles. The break angle of the string over the saddle seems just fine. And I'm not interested in using nail polish or loctite to fix this. A new bridge shouldn't have this problem. There is apparently another issue going on here. Has anyone had something like this happen? Thanks!