RE: GP Stuka, any good?
Try a Search for GP Stuka for more info. Mine looks pretty good out of the box, the covering wrinkled up some because of temperature changes (FedEx left it outside by the back door in 15 degree F weather). One of the other members of our club won one at our Christmas party, so I am recovering the rudder in yellow and will probably be repainting the cowling yellow too just to make it look different. I will be also trying for a more "scale-like" tailwheel setup.
Here is a link to the i4c siren: [link=http://www.i4cproducts.com/air_screamer.htm]Air Screamer[/link]
I also have a Pacific Aeromodels Gee Bee "Y". Both aircraft are low-wing with fixed conventional gear in streamlined "pants", but are quite a contrast in design.