we know that even the same model trainer can have differences in resistance. I propose there should be an adjustment to account for this. We should be able to adjust zPower by steps (+3, +2, +1, 0, -1, -2, -3) kind of like exposure adjustment on a camera. Or have some kind of power adjustment number we can enter (eg. -20W)
For my personal experience, I feel like my zPower is too high. I go too fast in the game when compared to my data in real life. I get around the problem by increasing my in game weight, but this is a very crude work around. I would like to be able to subtract a certain value from my zPower to adjust for the variance between Zwifts power values for my trainer (Blackburn Tech Fluid), and my actual trainer.
Another use case for such a feature is that you could use the adjustment to handicap yourself when riding with a friend who is an absolute beginner. So instead of having to ride slowly with a friend like in real life, you could simply slow yourself down virtually so they can keep up.
OBVIOUSLY there would be concerns with cheating if people add zPower instead of subtract. Perhaps we could allow only downward adjustments to zPower