I found a review posted on Tower Hobbies for the 1/6 scale Sig Cub using an OS .70 surpass which would probably make more power than a Saito FG 11. The post said:

Stan
5.0 star rating
12/19/22
Excellent flyer
Review by Stan on 19 Dec 2022review stating Excellent flyer. I had one of these for fifteen years. Had a blast with it. Flew so well. Final flight the batteries went dead and it crashed. I flew it with OS 70 surpass and it was perfect power to weight match. If it becomes available I will buy it hands down.