Sorry Pete that I didn't get back to right away. Don't sit on the PC that often.
Mine had a couple degrees of down thrust and right thrust. But it sounds like you are balanced to far back. Make sure you are balanced 25 to 30 percent back from the leading edge. And double check your incidences. Can't remember what they are supposed to be. And on mine the wing would slide back in the wing saddle until I blocked it at the trailing edge to prevent that.