Dave, before you begin, check your surfaces with a simple down line. Out of four UCD's I have found discrepancies with wing incidence. The elevator is easy to check with the counter balance and can be set visually. Take it up high, point it straight down with the throttle back, hands off and watch where it goes. If it favors the canopy, then the ailerons are slightly down attitude. If it favors the wheels, then then they are up too high. If it rolls they are unequal. Once satisfied, its time to move on to the thrust setting. Strange as it must seem, when I was running the S 100 it needed four degree right thrust. When moving to the YS 110 it only needed three degree. Different diameter props effects it as well. With a footprint of roughly 2 inches square on the motor mount, a 1/16 thick washer equals one degree within that dimension. Once dialed in it is sweet. Good luck, Joe