I replaced the bridge studs w SAE steel adaptors and installed a gotoh tuneomatic. all drop in, but with either bridge the saddle slots must be cut for the exact string gauge you are using or they bind. Once they are cut correctly, then they can be cleaned w some emory paper n lubed. perfecto. any residual ping or rattle is pre-empted w a tiny bit of silicon gel on the saddle screw behind the saddle and a tiny dab on both sides of the wire retainer. I did the same thing for my 99' SSU back in 00'. I use 11g strings on all my 24.6"scale gretsch guitars. A bigsby demands it.My bridge moves around alot when using bigsby. I've already replaced the tension bar and spring. Nut is lubed. Would like a drop in bridge upgrade. Thanks in advance.