@BraceMaker I have understood your position all along as establishing 36 mph (not some unlimited number) as the top possible speed allowed for a division.
The issue concerning the discrepancy in the AWSA max allowed speed and the IWWF allowed speed is independent of the point that advantage towards a maximum ZBS buoy count is gained when overspeed skiing is allowed. IWWF recognizes that fact and that's why they give no extra credit from the overspeed buoy count. AWSA should work hard to seek agreement with IWWF on division top speeds.
To accurately compare skiers within the same division, they must be held to the same top speed. ZBS attempts to normalize scores between skiers at different speeds, but it is just an approximation with a pass of six buoys approximately equal to a change of 2 mph. Fortunately, this approximation works slightly against those who would attempt to use it for gain over a skier at the max division speed. For that reason, I think ZBS is a good concept in that skiers can choose to deviate down from their division speed, but if they do so, they actually incur a slight performance penalty. Take the example of a skier that can run 4 buoys at 38 off at 34 mph. If the ZBS principle held true for equivalent score for equivalent talent at different speeds, that skier should be able to run 4 buoys at 39 off at 32 mph and achieve the same total buoy count. And yet that almost never happens. The same talent skier slowed down, just can't match his higher speed ZBS buoy count.
At the same time that skiing below a max division speed incurs a small penalty, if the option were allowed to ski above a max division speed is allowed, then an advantage is gained and that is why the ZBS concept should only be applied to reduced speeds from a division max speed and not be allowed for overspeed situations. If ZBS scoring is allowed in overspeed situations for a division, then all you have done is create a new max speed for that division as the best in that division will have to take advantage of the benefit gained from ZBS when used in an overspeed situation.