Originally Posted by
Duff
I believe they are called, "Locking Tone-Pro" bridges. I have one or two on some guitars, my Epi LP Plus top and I think my MK. Regular "Tone-Pros" that I have are not locking.
Although, according to the Gibson tech guy my new Epip LP Tribute has locking tonepros. But there are no allen screws. So I called and he said they have a new design locking tonepro that uses a spring mechanism inside the bridge and tailpiece.
Would the gibon guy lie to me????? They have had participated in some unethical practices lately: like the nondisclosure of weight relieving and chambering until some dudes saw xrays of their "solid body" LPs and were supposedly shocked by what they saw. Only then, years after the production method had been implemented, did gibson disclose the practice. Possibly a trade secret. They now include the chambering description in the chambered guitars, which is almost all gibsons except for custom shop models.