RE: Sig Astro Hog @ 150% ?
I am thinking that for a Saito 90 twin something with a 107 inch wingspan would need to be built light like a Sig Kadet in order to fly. Maybe a Sig Spacewalker (1/4 scale) would be a good comprimise that could be bashed into an Astrohog? Sig also has the 1/3 scale Spacewalker with a 104" wing, but that would require more engine than a .90 Saito twin.
Just a thought...