To go seperates you will need a brushless motor and esc, A brushed micro esc such as the Electrifly C-12 or equivelent and a gyro. Alot people including myself use the GY-240 gyro because it can be setup to work using the stock transmitter. The GY-401 has/requires remote gain which means you would need a new TX to use it. I've been running one of my Axes with separates using a esky outrunner and esc plus what I mention earlier and it works fine. You do have to worry about lipo cutoff using the C-12 though because it will cutout and leave you without tail control. But if you are using lipos then you already know you should be timing your flights and landing before that becomes an issue anyway. Still, To be on the safe side or at least avoid a crash check out the pixie 7 micro esc. The cutoff can apparently be adjusted to your liking. I actually witnessed the cutoff and luckily I was only 4-5 feet off the ground so I was able to get it down without damage. If I had been if foward flight it would have been a crash most likely. Again, If you time your flights you won't have any issues using the C-12 esc.