I would put a glow motor in it and call it 1/2A
I will dig through my plans and see if I still have the Herr J3.
Herr design that J3 for glow or electric with gearbox and that was back when sp400 can motors were gaining popularity. Great forward thinking, now that with BL setups equaling or less in weight than equivilent glow setups it is awesome.
Great flying model!
Contact SIG and they be able to supply the wing struts.