Unless you are doing some type of precision aerobatics with high onset rates lateral balance doesn't have quite the effect that most people imagine. Most trim variations that I have experienced is pitch change as the fuel load ahead of the cg burns off.
In full scale more than one plane has landed with hung ordinance on one side.
ORIGINAL: aerowoof
There is a discussion going on elsewhere on lateral balance.
I have noticed no trim changes in any of my multi engine planes as fuel is used unevenly during a flight and the laterally balance is changing constantly as my engines use fuel at slightly different rates.I include the duellist,Stafford b-24,twin stick,c-160,twin Comanche.even minor variations in rpm at different throttle setting have not caused trim changes,any one notice their trim changing as your flight progresses?