I just recently started building their ULTIMATE PITTS Bipe. I have the top wing done and it built pretty light. The instruction have lots of room for improvement. I nearly completely redesigned the tail end. It was a heavy design so I lightened it. I also made adjustments to the tail end for more rudder travel and lengthened the rudder by 1". Added 1.5" to the elevators.
I do believe that the fuse will be easily built, but I think I will replace some of the wood.

Good Luck
Jeff