Looking at the trim chart on the NSRCA page, I see that a pull out to the canopy needs an increase in wing or stab incidence. Sound like you are going the wrong way reducing the incidence. You should be raising the LE of the wing(increasing lift and AOA) to allow some down elevator trim to be applied in level flight. Then in the Poweroff vertical downline your newly applied down elevator trim will help tuck the nose under and reduce the pullout to the canopy(nose)

In your case, you are decreasing incidence in the wing, your reducing lift in the wing (lower AOA), requiring more up elevator to maintain level flight. You poweroff vertical downline now has more up trim in the elevator, compounding your problem.

All this is assuming your CG is close to the proper range.

I could be wrong in all this as well, but thats the way I was taught to set incidence in wings and stabs. If I am wrong someone please correct me. I usually spend days going on way then the other to get a plane trimmed out, and when I finally get it right, I dont know where I started or ended, just that I'm satisfied.

If you read several trim charts you will find that the incidence section on these charts are different. The one published in the 1997 KFactor had the incidence setting section reversed. I know that because it caused me some problems when trying to use it. I finally abandoned it, and went back to doing it the way I was taught to trim, and all was well.