Hi Mark
I saw you at the Bickley jet meet when you took your Hawk there, it is a big plane but its about 40 lbs in weight or there abouts.
I would have great difficulty in transporting something that big around.
I have been told that, some guys have fitted Jetcat 160 in the feibao hawk which is more powerful than the wren I am not sure of the dimensions of the 160, but it shouln't be too hard to find out.
Tony