Thanks - but can the MM ESC handle 14.8 Lipo battery ok?
Yes. It handles 12 cells, which is 14.4v nominal, so there is no reason why it won't handle 0.4v more of a 14.8v 4s lipo pack. Even right off the charger, 12 NiMH cells is 16.8v (~1.4v each), which is exactly what 4s lipo is. And then, the ESC has a built-in LVC setting for 4s too.