That is odd,my 60 w/OS1.08 balanced to 5.5" with battery approximately where AcroJo has his. I used Hitec 635 servos in the tail and 6V 1200mah. I'm sure the 1.08 is at least 5-8 oz. heavier than the YS110. I put a pull-pull rudd servo on the bottom of fuse,half way between battery hatch and tail. Yours must have all the heavy wood up front? They are very light and weak in the aft section.