RE: adjust the CG or trim
After I flight trim I do the dive test but drop it straight down, not at any set degrees or angles, just straight down. I watch the plane to see if it tucks in any direction then I land it and look at the controls with the plane and radio still turned on. If I have up trim in the elevator then I know it is nose heavy and if I have down trim in the elevator I know I am tail heavy. Most people are happy with the plane slightly nose heavy but the only way you will know what you like is by moving the CG around a LITTLE bit. I like my Extras CGed neutral but I have others I like a bit tail or nose heavy. One of those pilots choice thing.