I seem to be able to get it in around 7-8 guesses usually - based on a fairly good initial guess (85% or so) and the heuristic that if the percentage went up by

I seem to be able to get it in around 7-8 guesses usually - based on a fairly good initial guess (85% or so) and the heuristic that if the percentage went up by 1 in the previous axis increment / decrement, that axis is now at the correct value. It's a really entertaining game. Kudos to the author!