Thanks for the replies. I have'nt got to try it out yet (bad weather, work) but I hope I can get her out today for a maiden.
I mounted the 40FP as far forward as I could, used the heaviest spinner I had, mounted the reciever and battery pack as far forward as I could, but it is still ever so slightly tail heavy, but it is within range of the CG in the book. I'll stick a little weight under the fuel tank to rectify that before I fly.
Hopefully today I can get free long enough to go fly...