RE: Does CG affect an aircrtaft's pitch at slow speed?
Keep in mind that the affect of the CG location is not linear. So lots of effects you observe don't always line up neatly on a straight line chart.
And also keep in mind that what we feel as a result of the change to a CG is greatly affected by whether or not we've adjusted the elevator throws to keep pace with the CG's affects.
Good thing about our hobby is that we can easily test something and follow it immediately with another test.
The other day a guy was flying a "perfectly trimmed" plane he'd just bought from a buddy. Turns out the CG was almost at the leading edge of the wing. We taped some lead on the sucker and flew it around the circuit a couple of times. Added some more lead and went right back up. The airplane was flying much better by then. But the stick had gotten pretty sensitive, so I landed and we changed the elevator rigging. Took less than a minute and up again for another circuit. We'd lost no stability, but the stick was way less twitchy, and the airplane was lots more stable FEELING. We did all that on half a tank of gas and maybe 5-10 minutes time. And you know what we'd done?
The airplane wound up capable of landing with a lot less speed. And I could bring it in nose-up, way nose-up, on the prop. Because the sucker was lots more efficient and wasn't wasting all it's effort trying to keep the bloody nose from being pushed down. What we noticed was that the original owner had moved his choice of engine (oversized for the model) as far back as it would go, and that wasn't enough. Some designs can deal with more or less weight up front. Some can't. This one has a low aspect ratio tail that's not very far back. CG location is a very specific detail that is often affected by LOTS of other details.