I agree with having someone beside to help with the trims. I maidened a plane (Bridi kit) a few weeks back which I built in 2007. Nervous. Thought the surfaces were set right, but it needed alot of left aileron to trim out the plane. Nervously I was trimming the elevator in the wrong direction making it worse than better. Ten flights later, still in one piece. Just  have to adjust the engine better.

Good luck.

Jim