Yep, I have to agree, the CAT is the bees knees.
I've just changed from a B44 to a CAT SX and the CAT out of the box is a much easier drive. It also seems stronger with thicker 4mm carbon towers and big wishbones. You can fit normal stick lipo's so need to worry about what saddle lipo will be legal. The B44 has a tendency to nose dive a bit if you don't work the throttle spot on whereas the CAT flies nice and flat.
Awesome car that you won't regret buying
