Happy to report solving another 5 star variant Sudoku. This always takes me hours and lots of staring, but hey, entering that last digit and getting confirmation that the solution is correct is SO rewarding. (and I have a great partner in valacd where we bounce back and forth our thoughts over instant messaging).
https://logic-masters.de/Raetselportal/Raetsel/zeigen.php?id=000P81&kid=005LRC