That is odd. No one answered rs550 Qs. If I am not mistakes, some posted their "review" of how the HV-maxx run on this 3905 E-Maxx.
I used HV-Maxx 6.5 before in my old E (3906 version). runs great, long runtime and a bit faster than stock titans. No thermaliing what so ever.
For this veriosn 3905, I am planning to get the new MMM version. But I wll wait for the combo pack, not just the ESC. However, IF Novak is going to release a newer version of the HV-Maxx with the MOD 1 installed, I'll go for Novak. Just because from my experience (ESCs and bushless), I never had a single problem.
