Thanks all
A little more progress:
The rear fuselage is scribed 0.010" styrene sitting on a former at the front. The rear is flat where it meets the tailplane
And this is the benefit of the cabane struts being a part of the fuselage sides:
I will be able to use small pins to locate the top wing, the lower wing will either be self supporting, or hang from the upper wing via the struts. Far better than balancing the upper wing on a bunch of small sticks
I've solved the wheels problem after discussion with Costas at Gaspatch. We've both agreed the wheels in the picture of 1214 are probably 700mm Palmer Cords, so I've ordered a set of 3D printed ones from Gaspatch
So far, so good!
Richard