Mount the RX anyway you want. You should wrap it in some foam to protect it, or at least mount it with some velcro or foam tape to isolate it from vibration. Mount the servos with whatever hardware they come with.

I have the Mini Magic Extra myself, and since I mounted an OS .25FX up front, I had to put the RX and battery pack in the tail to balance it out. The tail of that plane has a hatch for easy access.