I built mine as per the instructions and it flies great, so if 1 degree up thrust is called for i'd put it in.
I have noticed a tendency for the plane to flare at very slow speed. It's very gentle and predictable but I have to put a little down elevator in when landing. I think this is a wing incedence problem and was making small changes to the top wing but ran out of summer before getting it nailed down for sure.