With your experience and personal risk assessment appearing sound, I don't have a concern at all. Are you team planning or diving solo? What will the other divers be on?
Without knowing you at all, perhaps a generic caution about your own skills assessment and what "pretty comfortable" means in case of real trouble at depth. At a glance your number of dives seem low to be doing trimix dives at all but I realize that's within minimum standards and respect you know your own limits and training progression.
Either way, a personal question to ask yourself is how many hours have you around 35m on air? There's a huge difference between a dozen 10 minute dives at depth and feeling ok compared to being ok with a few dozen hours at depth where you're down long enough face and overcome problems.
Hypercapnia is no fun, being dark narced in low viz while problem solving sucks. Deep, cold air dives are fine until something needs extra exertion that's where gas densities compound the issue and narcosis quickly make a comfortable dive dangerous.
For gas switch to air at 40m (or 65m if I'm being candid) I wouldn't give it another thought personally but would rather advise caution to another. Rather warn you unnecessarily than tell you everything is fine and be wrong.
I'd love to be doing that wreck, glad you're taking the opportunity.
All the best,
Cameron
P.s.Trimix is stupid expensive OC, it's why I went to a rebreather