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Setting the CG: There are no hard and fast rules for this. Pick the starting point as recommended for the model you have just built. Most of the time, this will be a bit to far forward. For instance, I am currently flying an Icepoint and have the CG 2" BEHIND the recommended starting point. This is not normal, but is not our of the ordinary either. I have always adjusted the CG based on the pattern I was flying, with a Novice pattern being more forward than an FAI pattern. Why? look at your pattern as analyze it for snaps, point rolls, and rolls. If you have snaps, more than likely you will want your CG back a bit farther than if you don't. As a basic guideline, set the CG such that there is very little pressure on the elevator when the plane is inverted. There are things to consider.. you can help trim for KE by using the CG, as a more aft CG will carry more down elevator than a more forward CG. There was a time I used CG as a helpful trimming aide for KE. AS I flew KE, I noticed I needed up elevator to make the KE straight, so I moved the CG forward more. There were some downsides, this increased the landing speed and the plane was very hard to snap. The test I use is pulling into a 45 and doing a 1/2 roll.. with very little elevator, you should be able to hold the 45 degree line.