W are still talking about models right? it really burns me when someone well read in full scale theory/practice comes into a thread and puts up info that has little to no use on the REMOTE CONTROLED airplane we are adderssing.
Yes, we're still talking about RC planes, but aerodynamic principles apply equally to both realms. How would RC be any different? Using the flight controls properly works better than adding washers under the motor mount, or a dime or quarter to a wingtip (as was written in MA a while ago).

You'll be fighting that right thrust when it's not needed, too. The pattern guys don't use washers or coins on a wingtip, they use their thumbs.
Hopefully, I won't catch any washers under my fullscale motor mounts during preflight.