Well I got the itch and went and dug out the beat up X4 I had sitting in my rc storage bins.
Got it running again with the stock motor using a small 72mhz rx and a 'decased' Losi mini esc from a MLST. Pic of the her nekkid:
I'm going to setup with a small speky rx and with a brushless from hacker (when it arrives).
Also found a great body since I want to make it a drifter, here's a pic of the skyline being painted...
So far it runs really well on 2 cell lipo, the hacker should be awesome...