Bummer, sounds like you may have a dogfighter or something similar. I have/had one of these (see my post,
Bye bye my little doggie in the
SPAD forum. It has a wicked roll rate, turns on a dime and gives change, does 10ft loops with ease, and with my tt .46 on front it makes a nice venture into pylon racing (I can do well over 100 in a dive, est. 80mph straight and level (although some people swear I'm doing over a 100 as it comes screaming by

)).
It will glide like a brick with a brick strapped to it. I have gotten used to it and can park it right at my feet if I want.
I love to fly mine (even raced them in 30mph winds). Now don't get me wrong....I'm not one of those people who think SPAD will rule the world but they do provide a nice alternative to regular wood planes (I like my foamies equally well).
They are fun but they will never replace balsa! They merely provide another avenue. If you do indeed have a dogfighter you may want to experiment with it (lighten it up or put a bigger engine on front).
Good Luck...