I’m not super familiar with the Lexel / TA triple channel drivers, never had one myself. I’m pretty sure they stuck to a “standard” layout though which should be consistent with TA’s FET+6+1 driver from this thread. Based on what I see with your driver, it of course is lacking the FET and it looks like it’s set up for 3+1 7135’s (one chip on it’s own channel for low modes, the other 3 on another channel). One thing that has me curious is the solder job by the middle pin of the 7135 that’s on the same side as the t85. As long as that isn’t doing something strange with the hardware layout…
I think the closest pre-built firmware you’ll find is the FW3A-NoFET build. The FW3A was a FET+7+1 normally. The NoFET build resulted in a layout like yours, but with 8 total 7135’s. The only real difference would be that the top end is lower (3x 7135 instead of 7x), so it might look a little slower at the top end when ramping.
It looks like TK’s most recent pre-built hex files for Anduril2 are from 2021-08-31:
http://toykeeper.net/torches/fsm/anduril2/anduril.2021-08-31.fw3a-nofet.hex
It sounds like you’re experienced with backing up hex files from a driver and flashing them to another. Just to be on the safe side, it might not hurt to make sure you have that original hex file sitting around just in case you need to revert.