Here are the specs per great planes:

Wing: 66 in
wing area: 743 sq in
weight: 11.25-12.25 lb
loading: 34.9-38 oz/sq ft
length: 45
engine: .91-1.08 2s or 1.20 fs

Looking at this, and the fact that the 1.80 is only .5 oz heavier than the os 120 recommended, I think it will be ok. I talked with a rep at the chicago hobby show last weekend, and he said it flys remarkably home. He gave me the warnings, of not to get it too slow, and to fly it in to landing. I asked him about a saito 150, and he said it should be fine, the 180 is lighter than the 150. He said that he just bought one, and I asked him what engine he was going to use. He said that he is going to start with the os 120, and if it wasn't enough he was going to put at os 1.6fx 2 stroke. So i don't know I may also keep building, and see how much weight is it going to take up front.

Keep the post coming, there has got to be more of these things out there.

Thanks,
Ryan