Glad to see my thread took off and that it hopefully helped some people. In my experience:
1) Stick with an OFR or Schaller. Regular Schaller trems are slightly smaller than OFRs and are better for intonating low tunings on guitars with small routes. Lockmeisters are identical in size to OFRs.
If you're putting the hardware on import guitars like I tend to do, you'll only use the bridge since most of your parts will be metric and OFRs and Schallers (to my knowledge) are imperial.
2) FR and Schaller offer different finishes to each other. Schaller doesn't offer a satin chrome bridge. FR does. This is what made my decision for me. It really is that close in terms of quality.
3) FR1000s are equivalent to OFRs in quality. They are OEM on import guitars only.
4) Schallers have the benefit of removable knife edges on the baseplate. When they wear out, just switch them instead of the whole baseplate.
5) I've tried the compensation prior to locking down the nut trick and was always a little off. I appreciate the retainers now.
6) I have all the confusion FR newbs do but with Ibanez Edge bridges and their spinoffs. Makes me afraid to get into Ibby-World since they quoted me a $300 price for an Ibanez Edge bridge straight from the factory. Gotohs are patterned after them I think but don't fit exactly.
So I've always wanted to try more Ibbys but didn't want to pay the premium of upgrading one of their cheaper guitars. I would appreciate any insight on Edges although I think Jemsite already did a compatibility chart.
7) Herman Li of Dragon Force did an in depth video on Floyd tuning. Even his high end stuff doesn't stay in perfectly. Hope this helps:
https://www.youtube.com/watch?v=dyzTJ-R89KI&t=55s
In my experience most people struggle with FR tuning because of a bad bridge or a bad setup.
You should go:
1) Claw
2) Truss rod (doesn't need to be changed often and will not break as easily as people say)
3) Action
4) String length
5) Recheck each as needed
Having the claw at equilibrium as you work will fix a lot of problems.
My former teacher John Carruthers, who also helped develop early EMGs, taught guitar maintenance at Musician's Institute/GIT. He has some helpful videos here:
https://www.youtube.com/watch?v=PHHepmTX3So