I am fairly new to modelling and have a COG question.

I built and am flying a GWS A-10.

The COG on my plane is a bit behind the recommended location, meaning my model is tail heavy. i would have expected this to cause the plane to porpoise upward to a stall, but in flying I have found it has quite the opposite affect of what I was expecting. the plane wants to nose in with the elevator centered. I actually have to apply a good bit of up elevator to achieve level flight. Is this normal? Are my initial thoughts on the affect of being tailheavy 180 degrees off?

Just wondering:
Basically, what are the affects of having a tailheavy plane, and what are the affects of being a little nose heavy.