Thx Jake. Went and looked and I see that there now are basic numbers for the various F-classes, ergo not manu-specific, you're right. Haven't had any formula boats at my races, good to learn something new.

On another point, fwiw, some time ago both Hobock and Diamond told me that if in doubt (without measurement proof), to always hit the unknown boat hard, because it's more just to hit the one than (edit: take the chance on punishing) the fleet. I wonder how often that concept gets applied...