You are going to get 20 different opinions on this one. Here's mine. From my experience making plane adjustments changing the CG will not change your trim setting at all. I believe this might be because there is so much lift in the tail that changing CG will not have an effect on trim. Changing CG will affect how the plane knife edges though. Basically what a more advanced flyer had me do was get the CG very close to recommended setting and to set all my surfaces to neutral trim and fly the plane out of trim and see what the plane was doing. I basically landed the plane out of trim and started making wing incidence adjustments till the plane flew straight and level with no trim added. Then I focused on the CG. If the plane pulled to canopy I move CG back and if you pull to the belly move CG up. Dave Snow says that the stab will follow the wing pretty much no matter what. So what he means is most of your adjusting should be to your wings assuming all other stab and thrust settings are on their mark.

Hope this helps you out.

Evan