Great job! As for Kai's hi-hat stops, it's actually something he's been doing for a few years, he explains it in this video, hope it helps! :) ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-BGMbHHgga18.html
Amazing cover man, so clean on the drums, especially coming back in at the final chorus after that moment of silence -- absolutely awesome! Wish I could figure out how the hell Kai manages the hihat closes whilst maintaining such a fast bass pedal speed in the bridge, it stumped me the first time I listened to it, too!