Alright I'm getting back into flying R/C again. I have mastered the trainer and have decided to move onto a .40 size cap. Yeah I know, big leap. I have flown before a few years ago, and feal like I'm ready for the cap.

I picked up the cap from a swap meet, it is a used ARF, in excelent condition. The PO told me that it was a thunder tiger Cap 232. I cannot find a manual for a thunder tiger cap.

The problem I have ran into is that I do not know where to set the center of gravity. From my past expierences I remember that it is ~ 25% of the wing cord from the leading edge, which puts it about 3 1/8" back from the LE which is also the tallest part of the wing. This seams to me like it would be about right, do you agree?

The next problem is that in order to balance at that point, I will need to add about .4 pounds (6.4 oz) to the nose. That seams like a whole lot to me. Is it really a lot, or no? I have already moved the battery as far forward as possible.

The motor on it is a evolution .40. I have an OS MAX .58, but just weighed it and it is actually less weight so swapping wont help.
There is two lead weights on the firewall from the PO and it looks like there used to be 3 more.

Please help me out, I'm eager to get this thing into the air.