I love my WB 60 too
So smooth in the roll, and ZERO pitch/roll coupling. really. none.
a .91 FX and built stock mine weighs 8 lbs dry with JR 8231's and a 800 mah nicad pack.
most rudder authority of any pattern plane I've flown- any size.
I am gonna try to change some hardware and lose a few ounces, but since I fly more pattern than 3-d stuff, with the weight it cuts through the wind like a Goldberg Extra (real well)