Glenn

I am using the Futaba servos that seem to have been designed perfectly for the plane. They fit into the cutouts whereas JR servos will leave a gap. Of course, this is only aesthetic and won't affect the performance of the plane.
As for RX battery, at first i used a simple 4 cell 1400 NiMh which I soldered up myself. But now I am using a Flightpower 2S 1320 lipo with a regulator I got from Central Hobbies in the USA. Expensive setup but does look "trick" in the model!

What motor and batts are you planning to use?

Someone earlier suggested to me offline to use the same servos for the ailerons as the elevator.. the throws are not extreme and you would save even more weight. I only fly for sport and fun... I kinda wish I had taken his advice now.

Regards

Mike