RE: Goldberg Matrix
I've got one with a KRAFT 60 on it. it's nose heavy and I'm to lazy to put the CG where it's supose to be. It does fly great (pattern style), mine snaps pretty quick and to much elevator makes it uncontrolable when trying to recover I love this airplane for one reason...inverted flight. Love it for that. 3D....don't think so with mine. Flies a lot like my Great planes giles 202 Kit did. I think it's over priced as well...glad I got mine from a friend that didn't want it anymore.
If I put a smaller engine and put the CG in the right spot I'm sure it would be different...