Absolutly, forget it.
It isn't a weight thing... it's about the power/trust/aerolane size ratio... You'll be needin' like 15 degrees of right thrust!!!
Plus a bigger fuel tank, lager prop(ground clearence probs') etc etc.
The YS is a better way to go... and hey, you can put the tank on the CG. Something you cant do with the FX without a cline.