I'm sure you already know that any flashing carries some risk and that cross-flashing greatly increases the chance of a irreversible problem. Changing the devices' HWID and its region layout amplifies the risk many more times again. I'll look at the files linked in your post when i have time and post again with my thoughts, however i must say that having such symptoms re-occurring with different fw and HWIDs doesn't bode well for recovery.