I have a Saito .91 on a Hangar 9 Ulta Stick with a Perry pump, just breaking it in. Runs great and flys super. It is not a Golden Knight but I added the velocity stack and it really keeps the open fire wall clean and improves the fuel consumption. I also have a Magnum .91 four stroke, an OS 70 Surpass II, Magnum .52 and a Magnum .30. All are great engines if taken care of.

Love those four strokes !

Cheers,

Chip