Puzzle Boss Rush 2- Day 2 (Nested Heyawake)

Last winter, the Japanese puzzle Twitter community put on a 9 day event called Boss Rush, with 9 days of (mostly) marathon puzzles. I took part with Puzzlers' Club and never placed worse than 4th, with 4 1st places. This year, they're doing it again but my mornings aren't free, and so I can't officially participate. But that's not going to stop me from solving the puzzles anyway! Puzzle info:   / 1338091301741346817   Puzzle page:
Apparently giant Heyawake puzzles are one of my specialties, as when they get raced on Puzzlers Club I tend to massively outperform the rest. This one didn't seem to be any exception as I cruised through with only one minor mistake that was easily fixed. Had I been competing, my time across both parts would have been sufficient for second place easily, only behind Ken Endo, ------------------- Discord:   / discord   Patreon:   / ihnn   Twitch:   / ihavenonamesda   Twitter:   / ihnn1