+2 had the same issue. called castle, little upset the internal bec cant handle the high power servos. almost was gunna sell and go tekin. guess it dont matter which brand. they told that i can do one of 2 things. either go with an external bec or the cap [spm1600]. just recieved the cap today, just tried it and seems to have fixed the prob.

didnt want to re-solder the esc with the bec and another 25-30$ bucks..hopefully it holds up..why cant they just update the mmp to handle whatever you throw at it..