ORIGINAL: dredhea
Barwelle,
I know it'll require a little surgery, but have you considered moving the servo tray to the rear a little? I had to add almost 3 oz. to get my PT40 to balance with a Tower Hobbies .46 on it. I removed the covering from the back lightening hole in the bottom of the fuse and epoxied lead "split-shot" sinkers just aft of there. Your post made me take a good look at it, and moving the servo tray would have been a much better option. (I wish I knew then what I know now).
I presume that your tray is located just forward of the main gear since you have room for the battery and RX behind it.
It would be a pretty tight fit to do that, even if it was possible. For one thing, I would have to buy a couple pushrods because I already put it all together. Then I would have to move the bat. and Rx either to where the servo tray is (and that would defeat the whole purpose) or move it back, into the rear fuse. that would require surgery. the other day, I talked to the LHS guy and asked him about ripping open the rear fuse and putting a bigger battery in there to balance. He said instead of ripping it open just put some weights in a hole in the back (similar to what ED STEFAN said).