If you're worried about roll trim, I doubt you will detect any trim changes from slow speed to high speed. I know first hand, because one ARF (jet) I built (ahem, assembled!) was off in wing incidence, and had visually noticeable aileron trim required. For pitch trim, if you develop trim change issues here, it is most likely from CG or thrustline issues.

Just build the model as if it were going to be a pattern or aerobatic model, check the wing incidence angles at a few wing stations, etc.