Really? The OFR I bought last year must've been old stock, it had a steel block. Not that I plan to go out and buy brass blocks or anything.. :lol:
Schaller plates the blocks with something (not sure what, maybe zinc), but I assure you they are brass. When I installed a big block in my OFR-7, you could see it in the threaded holes where the block bolted to the base plate. They do a really good job, so I had no idea until that moment. Seems sensible to me, since brass tarnishes rather easily. I'm guessing the bridges were too bright with stainless steel, brass was cheaper, or some combination of both.
Oh, and you owe it to yourself to buy a big bock. It's not gonna get you to tune-o-matic territory, but the guitar definitely has a lot more girth now. I basically got my midrange back. The thing is HUGE, it actually limited my pull up range, but man does it ever sound fucking killer.
That retainer spring on the bottom is pretty damn strong, I had to 'break it in' to get the damn D-tuna working right. I can't see the tuning slipping from the saddles moving, but anything is possible. :scream:
It's one of those things that is part of the patent, and Floyd let no one license it. All the copies are south of 80 degrees (except the Schaller and Ping branded bridge, which is ~85). Of course, it might not make a difference at all, but I notice it right away. You logic about the retaining spring is sound, so I can only speculate as to Floyd's reasoning. Perhaps it is similar to tuning with the tuning machines, where you know that you always want to approach the note from below, to avoid binding in the nut. Maybe it is so rare that most people never even experience it, but it would be keeping with the nature of the man who over-engineered everything, and then found a savvy marketing plan.