I'm a little confused. If it's balanced on the CG, why is it nosing down? Is the wing set at negative incidence? Is the engine thrust pointed down? Is the horizontal stab incidence positive? How does it fly inverted?

There are trimming charts on the IMAC and NSRCA pages, as well as on Geistware's page and other websites. Maybe there's even one on the RCU site someplace. You go through a logical sequence and establish whether the balance is off, or the incidence is off, or the engine thrust is off, by making maneuvers for comparison - but you start with the balance point at the recommended CG and the trims at straight & level normal flight.

From Kaz's post, it sounds like the plane is designed with negative incidence, not with a tail heavy condition - because he recommends correcting it by making the wing incidence more positive. I'm confused about whether the recommended balance point is off, or the as-designed wing incidence, or something else.

Good luck,
Dave Olson