I had a thread on this 6 mos ago.I lost 4 mph in my E-revo going from a Quark 80b to a MM, Everything else the same.Gained 2 back when I went with the MMM. Something is going on ,I just wish someone would figure it out. I messed with settings , controllers and gpses and never could find the lost performance.Good thing the MMM could handle higher gearing .