I offered to do a beta build of Dragos' Brown B-1 racer, and was very happy when he took me up on it (love those classic racers). Initial observations: The file is A4 size, but Dragos left enough kerf on top and bottom so that it can be printed at 100% on letter size paper too - smart. Its 56 pieces are arranged neatly, and there is a clearly labeled drawing of the finished airplane on the parts page to serve as instructions. There are no glue tabs or glue strips provided with the beta. The wings are laid out against the paper grain, which will make it more difficult to obtain a smoothly rounded and crinkle free leading edge. Rotating these parts 90 degrees would be preferable, if possible. The model is equipped with a seat and instrument panel. I don't know if Dragos has any further cockpit details in mind for the model's final release. The assembly style is paired bulkhead. There is a tall, narrow hump down the center of the aft fuselage which I expect will offer a challenge when forming the skins. I've started cutting paper, so there will be more soon. Sorry about the photo, I can't get it to post correctly. It keeps coming out as a negative in the preview. Weird.