I also attempt to get the receiver aft of all the rest of the heavy items in the airplane. This does a few things. 1). It helps protect the receiver from damage by having all the other stuff hit first, instead of pounding on the receiver. 2). It get the antenna away from the servos and other wiring which might reduce radio range or cause glitching. 3). It arranges the heavier items forward where the weight is generally needed and the lightest component (the receiver) aft where it's weight is easy to compensate for. I may not always be able to get it to be the farthest aft and sometimes will only be able to get it under the servos, where at least it will run neck and neck smashing into other stuff.

Thinking about this, I don't ever recall having an airplane where I mounted the battery aft of any part of the radio. Considering the dynamics of what transpires during a crash, I just wouldn't put the battery in the back. If you ended up nose heavy and moved the battery aft to achieve a balance, keeping the battery forward could be compensated by so little weight in the tail as to be almost inconsequential.