What kind of airplane is this?
I think Bob is right, Flightcraft. I don't know if they are still around, you may want to try and do a search. I believe they only made .40 size aircraft, and all with ABS fuses.
My guess is the CG should be about 3 1/8" to 3 1/4" from the leading edge at the fuse sides.
Good luck,
Gary