@aashtonk I’m glad you like it! 🙂
While doing head tracking, if you move your physical, hardware mouse at all, then it won’t store any training data. However, don’t worry too much about the training. The eye tracking is sensitive and may give slightly different results simply by you shifting your seating position.
Training should be natural and not something you need to be conscious of: you just look, hold the hotkey, move your head if needed, then release to click. The next time you look at that area it will likely be more accurate. If you do get bad training data, the next time you look at that area it may be slightly inaccurate initially, but if you just move your head to fix it, the bad data is gone.