Sparky,

I believe something may be wrong by having both wings and stabilizer with positive angle, especially after you stated that the plane flies pretty good except with down elevator trim.

The stab is supposed to counteract the nose pitching effect of the cambered wings, for single or dual wings.

Although obvious, I have asked about the balance because the elevator trim is an indicator of unbalance sometimes.

Please refer to these articles:

http://findarticles.com/p/articles/m...2/ai_n8799373/

http://findarticles.com/p/articles/m...g=content;col1

http://findarticles.com/p/articles/m.../ai_n15640837/

Regards!