anybody know about the thrust on this plane??? I have had to add up thrust because it climbs when I cut the throttle.I have yet to fly it since I have done this so I haope that is all it is. Any one else have this problem?? normaly arfs come with the thrust already taken care of but maybe its different if you add a engine thats not recomended I dont know????I am using the YS 110. any comments woould be appreciated