I agree. trim is mainly for rigging problems, fuel imbalance and s=assymetrical thrust to synch engine rpm but never for in flight winds because once in the flow you need none. Only after take off or before landing do you need to do much with an airline rudder in the air. The yaw damper takes care of turns, etc. Be careful when you go back to the J3. The best way to trim a jet is synch the engines and use the rudder trim to make the wings level. One captain I had put our inclinometer ball in the middle and flew in a slip so I got a screwdriver and leveled the inclinometer to make him fly straight. We saved fuel and drinks were not sliding off the table. I thought everybody knew that.