Hey RORO, after reading your post, I went back and tried to fit the Saito 65 into the cowl again. I tried inverted before, and I tried it again....Either you've got engine sticking out , or you have a magic wand in your shop! Can I borrow it?
I'd love to put a twin in mine too...yes they sound great! I have an O.S. 160 twin that I fly regularly, and it's my favorite engine!