How did your tiger 60 perform with the OS 70. I currently have a saito 72 and waiting for the tiger 60 arf to come in. I have read a thousand post where people are putting saito 100's and saito 91's in this plane to get good performance. Do you believe there is a need for such a large engine in this plane. I'm confused, I have a saito 100 I could put in the plane, but would rather install the 72. Let me know how performance and flight time was on your setup.