Paul,
Perhaps the 1 oz. tank hasn't worked as a universal speed limiter, but it does reduce the amount of time the pilots have to dance during fast 3-up racing. As you pointed out, someone will end up spending a good deal of time in the pit with a fuel bottle....and with fully cowled, inverted engines the flippity-flippity period can be unpredictable. In short races, more fuel stops actually makes things harder, since it is more likely that two guys will come down at about the same time. In longer races, things get more spread out and it gets easier. The features that the pilot really is after in modern B-TR is a light (LIGHT!) plane and one that grooves well but can still maneuver when required. These features help avoid the high flying when the differential speeds are large. Oh, and the one feature we would like to do without? The propensity to roll in on takeoff and wind up the lines or chase the guys in the center! Extremely non-optimal....
Responding to other replies, I wouldn't sell the Redskin design short. If I remember correctly, last year one placed at Cabin Fever. You might want to make the wing more rugged, but I bet one with a competitive engine and the innerds set up right wouldn't have anything to apologize for. Remember, in B-TR anything can happen, and in my experience does, and regularly. If you don't blow up, if you don't burn up, and if you don't catch on fire; if your don't wrap your lines around the prop shaft; if you don't leave your landing gear laying on the asphalt while landing; if you don't break a prop in the pit; if you don't lose a plug (or three); if you don't break the shutoff; if you don't lose the P/L; if....nothing bad happens to you, you are definitely still in it!
Dave