Tiny update - familiarity with the Red Special will help here as I don't have visuals (except for this image of Brian Mays second version of the tremolo in testing):
Solidifying important decisions that all interrelate, My goal was to build the tremolo unit, basically the same as BMs Red Special. The one thing I don't like about his tremolo is that the knife edge plate is screwed and them buried under the top. If it were to loosen and rattle you are out of luck. Plus, on my build I have a full carved top, vs his veneer. There is a commercial example that combines the knife edge onto the bolt block and would be accessible. I'm considering caving in and just buying one.
Also, the Red Special tremolo is installed from the top. With a full carved top, All I need is an opening for the tailpiece string retainer, and am considering installing this from the back. This also eliminates the cover on the carved top. As I'm also still aiming at a radiused body, this would complicate the back cover but it's not impossible. Had also considered having the top open to SHOW the tremolo exposed, it's really beautiful, but maybe out of place here.