Okay....The major discussion is trim. My position on this is that you want the same on both sides. You want accuracy on the whole airframe, spiralling prop blast notwithstanding. Indeed the spiralling prop blast causes several key effects, one major one being the apparent requirement for right thrust to counter some of the effect.

Having said that, I don't put any offsets into the stab incidence for each half on purpose. Some folks believe this helps and that's fine...yet others believe that offsetting wing halves also helps and that's also fine. Yet others don't want engine offsets and adjust the right thrust electronically by mixing rudder with throttle

To me, some of these offsets essentially make a crooked airplane out of straight one, assuming the plane was built straight to begin with. This is a very big assumption because accuracy is tough to reach....it's an absolute.

I prefer simply to know my starting point, adjusting certain things like wing and stab incidence (whole surfaces not halves), cg and very slight engine offsets, and once these things are exhausted, only then do very small amounts of e-mixing.

I think the main points are that first you really need to know what you are doing and second, almost anything goes regards to trim preference. Asking people for a certain type of help is generally a good idea if you can't figure it out youself. And BTW, don't expect miracles right away...often it takes several tries before the desired result can be achieved. Don't get discouraged...it can be frustrating.

MattK