I think the 110 is overkill as the plane should come in at 6.7 pounds with it. The 110 is 27.5oz where the SA100 is 21.5oz. -- so 6oz less.

This is the weight range I would run these motors.
SA100--5.5 to 7.5 pound plane 600+ inches of wing area
YS110- 7 to 9.5 pound plane---800+ inches of wing area

I will post my rear servo install soon. Just got done wrestling with the landing gear--the 3rd hole was drilled incorrect so I had to make new holes in the landing gear.