Man, I am so embarrassed...and how do i drop out of supercruise?
It feels a bit counter-intuitive to start with but to drop out you do the same action to enable supercruise. In practice, you only need to go down to 99% and then hold the modifer back to 100% for it to activate/deactivate. In game it doesn't impact your speed much due to the lag in the acceleration. To emergency drop out just go back and forth twice. Almost like a little 'bump' action off the 100%.
Cheers, AD