I am building a Super Aeromaster. It is a discontinued kit from Great Planes. It is a bipe with a 52 in wingspan. And Ibelieve the total weight will come in at 10 pds or less. Ithink GP recommends a 90/1.20 4 stroke or 60/90 2 stroke. Iwould prefer a 4 stroke but Ican go either way with this.
The a/c's capabilities are much greater than the pilot in this case. So Ido not necessarily need the power to do 3d type stuff. But it might be that the "right" engine for this model just happens to have that kind of power?
Ihave flown OS and Magnum and like them both. Icant say Icare for the OS price tag very much. Is there a Saito that would be a good fit for this model? Price is always a factor, but not the final decision point. Iam looking for the right combination of power, price, and reliability. Iwould appreciate any recommendations any of you can give on which engine to chose for this project.

The Saito 82 would be a very nice sport engine for the Aeromaster

I have friends with ST60 blue heads and Saito 72's on them. I don't think they need a 91 or 100.