Top-Flight Contender
I'm building one at the moment and added 40% more area to the rudder. Followed the silhouette of the horizontal stab but with just a touch of reverse slope (sorta P-51 ish) and a bit better framing. The plan rudder looks like an afterthought. I notice most people who bash the kit add rudder area.
Sticking an OS FS-70 IIS on mine.