I've been flying my WM Chippie for 5 years with a YS 1.20. It has never flown as good as my Goldberg Chipmunk(s) due to weight issues. So...I re-engined it with an OS .91, removed the twin elevator servos and put in an MK elevator crank from Central Hobbies. I could not make myself do the elevator pushrod thing, way too flexy for my taste. I also got to take out 5 oz of tail-weight. In total, I removed nearly 3\4 Lb. so I am excited about the way it should fly now.

Good Luck Flyboy76 on your maiden!