Steel - you are on the bleeding edge here - untested, new territory, where no man has gone before, etc... Throw in a couple "should work"'s, and that's where things are. I had the "known good" raptor claw 7135 on my driver, plus the C3 and C4 I think properly installed, and still my 7135 apparently blew up.
DEL suggested I use the FET with the 7135 turned off (here: https://budgetlightforum.com/t/-/44006), so for ramping, that means a new ramping table and for mode sets, new values. Again though, nothing proven yet.