Yeah, Charlie. This should be a normal part of the initial setup and part of the focus on the first several flights for a new plane. Once trim is added, it should be subtracted out mechanically so that your trims on the radio are as close to 0 or centered as possible.

I spent some time with my Goldberg Skylark 70 but could never get it exactly right until the "club pro" worked with me for about an hour one day. Now that plane flys like a pattern plane.. after take off, minor trim for the set throttle level, then hands off and it flys straight as an arrow. Then I pull on the elevator and go straight up with hands off and it goes straight up with no input. Inverted flight uses a very slight up pressure on the stick and it too goes straight as an arrow.

So, as also suggested in other replies, spend a little time with the mechanical trim to get the radio transmitter sticks as close to centered as possible with the plane in full and just about perfect trim and you will never have to worry about changing out transmitters.

CGr.