Heres a couple of pics of the nose. When I fly powered I put the battery pack first then ESC and then the servos. I run full size servos as I need the weight any way. The RX is placed under the LE of the wing bay. When I dont use power I put the battery first then the RX and the servos stay the same. Have to add about a 1/2 ounce I think.

I think that your idea of cuttting some holes in the fuse behind the wing is a good one. And with the motor plus the batteries and if you can fit the "55s" and or the RX all in the nose maybe you will balance OK. Have found that this plane is not touchy in the CG kocation and mine flys better a little tail heavy esp. on the slope when you need quick turns and shows lift better too. The plan CG is set pretty far foward because Im sure it is mostly appealing to soaring starters, because nowdays the big boys want all the whistles and bells.
Post back if I can help you or when you get it up!!!!!!!!!!!!
Good Luck
Bob