your YS110 probably weighs about the same as my TT 120 2 Stroke about 32 Oz with muffler. I believe the YS110 is about the same at
about 29 Oz with muffler. I opted for the Push Pull system with Servo mounted in the Tail and have the battery.. 5 Cell NiMh at the the back of the compartment. Cg right on reccomended. Flies nice that way.. although most of the guys that fly 3d in the club say CG should be moved back beyond reccomended but I like it there so you should have no issues putting the servo in the tail.