Where you will notice the incidence issue most is on KE.

Even though your stabs are not adjustable it can be done... I just finished doing it on a Yak and the difference was night and day.

First take off your canopy and put a level on the canopy line... raise the tail till you are perfectly level. Check your wings and they should be at 0. From there check your stabs.. they should be at 0 as well.. if they are at 1 or 2 then you should consider spending maybe an hr to fix the issue.

All you need to do is enlongate (sp) the anti-rotation pin holes and maybe the holes in the tab that keeps the stab in plane. Take a rat tail file and slowly length the hole in the direction you need to go. Then just get it so you are at 0. Harden the holes with CA and then take some epoxy and make the dowel slightly larger on top or bottom so it's a snug fit and keeps your incidence at 0. Take your time and sand it so its a perfect nice and tight fit.

You will spend maybe an hr or 2 depending how fast you work and in the end with 0-0 incidence you will be closer to where you want to be and the plane will fly even better.