I wanted to suggest a new feature for your app. I have noticed that we can use apple trackpad 2 in the "upside-down" mode. Maybe it would be possible to introduce a similar feature that would reverse/mirror its finger detection? In the current state it detects my little finger as the index finger and the palm rejection doesn't work.
Solving this problem would help us (lefties) a lot, as using the trackpad 'as is' becomes painful after a while because we have to curl up some fingers and try to keep them out of the trackpad's surface.