I don't know what you've really got there, but the photo indicates the fuselage is snapped at the wing TE, the flaps are tiny, the stab/elevator seems very small for the wing size, and the model looks generally beat up. Not to be too pessimistic, but you may be better off to flog this one at the next swap meet and get a modern, normal-dimensioned stunter with a proven design. The model looks like it may be an RC conversion, or a one-off design. I am also skeptical the wing area is over 800 inches with a 60 inch span and significant taper. How about a Brodak P40 or something that is available in the UK (if that is where you are, judging from the price on the wing)? I see a lot of headaches in the future with this one.