T28Pilot, I have an OS 1.6 (stock (lightened) muff), single servo for the ELE. with pull pull (ele and rudder). I have done some serious surgery (cutting) on the air frame and am using CF LG and wing tube, no wheel pants, CF control linkage in the wing, drilled aluminum servo tray, Drilled aluminum engine housing, etc.... I have added no additional weight to the plane for balance and weigh in at 11.9. Granted, I have dig core less servos and a 3000ma batt and am finding new ways to loose weight each day, but we are talking 1.3 LB difference here. How are you doing this??