Here is a pic of the SPAD in question (if I did this attachment thing right). It is a 'Wasp' made out of coroplast. It weighs abount 4lbs (my scale is not very accurate), maybe a bit more. The plane will hover, knife edge, flat spin... all day long. It has a very blunt lead edge, 47in span, magnum 46 with a tuned pipe. I had a spad sport plane with a symetrictical airfoil that was not as thick as this one and it slowed very nicely and it weighed more than this.

I have flown a friend's TT Giles 200 funfly and it really slows down. It weighs about what mine does. And when it gets close to stall it just mushes. Mine has a sharper stall effect even though it has all the funfly characteristics.

I was thinking that perhaps that if the CG is in a set location and the mass in front of the wing is longer, as opposed to having less mass in front of the wing, that it might effect the flying characteristics, especially at slow speeds.

I definately understand about having the CG too far back. The first few flights it was so far back as to make the plane unflyable. I was lucky to get down in one piece.