I have an old Ultra Stick 120 (not lite) and I put the servos in the tail and a McCulloch 28cc with elect. ignition and didn't have to move anything or add weight for balance. I still have not flown it yet as I am waiting for new servos (and will re-balance at that time). I just bolted up to the existing firewall location.

I wish I had the lite version as 2 1/2 pounds lighter would be great. Even if I had to put a half pound in the tail it would still be better.

I'll let you know how it flies hopefully in a week or two.

Rob