First post here..but thought I might weigh in considering I flew my Nexstar for the first time this past weekend.

I had the same issue with the plane requiring a consistent down elevator to maintain level flight. In fact, on my third take off, it literally jumped off the ground and nearly stalled (perhaps wind induced?) I brought her home, adjusted the elevator clevis, and hope to find this weekend if that helped.

BTW I am a complete rookie, and I know I'm going to get flamed for this, but my first flights were w/o an instructor. I simply practiced quite a bit in the simulator in all types of conditions (probably logged 15-20 hours on simulator) before a I went out. Aside from the elevator issue I was able to control the plane well and landed without any major mishaps.