Just to clarify something I see a lot of confusion about. The CG is the point on the airplane where it sits level when supported.

Airplane kits/arfs have a "recommended CG" specified somewhere, in the plans, instructions or whatever.

In other words, the instuctions don't tell you where the CG is, they tell you where the CG SHOULD BE. You measure where it IS, then move things or add weight to move it to where it should be.

So, when you put the plane on the balancer the first time, you never really saw where the CG was, since the plane fell tail-down. You did find out that the CG was behind the recommeded location, ie the plane was tail heavy.

Now that you've moved the CG to be within the recommended range, I'm sure the plane will fly better. Good Luck and have fun!