My friend has one with a OS 160 and it flys very well. I bought a GP wagstaff (approx. same size) with the intention of putting my Saito 180 on it.
My friend thinks the Saito will fly it ? But I have backed out and will put a gasser on it "No Guts"
Wish I could also hear from some one who has tried a Saito 180 on this size plane.
It flew my deceased Hanger 9 540 very well, but was smaller in overall size, although wing span was same.