I see... sounds a bit of a gamble then! I'll probably not end up attempting to reprogram any myself because I barely know how ESCs work anyway! I've heard about some motors in heavies being run off 2 ESCs before (Sewer Snake did it at some point, I think?) so I think it'll be doable to use 2 TZ85As for it. If it manages to run on one though, that's very impressive! Might actually be able to build a heavyweight if they're usable for that!