Been flying Pattern for a year and still trying to learn how to trim an airplane. I refer the NSRCA trim chart as well as others. Problem is a lack of experence at this level of trimming. My son and I just finished his Venus II . First flight required almost all available up trim (from radio), about 1/8" for level flight. Noticed that tail came up quickly on TO and had to use considerable up elevator to get airborne. CG was at forward limit. Moved CG to center of range w/o much change. If this is a CG problem, it appears it will be well out of the design limit to cause a significant change. Admittedly, I am a little hung up on going outside the recommended limit. The plane does not hold a 45* up line and requires some down stick for inverted flight. How much is too much? Downthrust is 1 degree which is the design spec. Incidence, as well as I can measure it, is zero. Next move is to move CG back in 1/4" increments and see what happens. I welcome your comments.

John