It sure gets hot in a tin shed hangar when the temps are hovering about 100 and there is no breeze! Despite that, I have been hitting it in spurts and getting a lot done. I actually got one wing on before I got too hot to work! The air has to escape when you fill the tanks, and my path for that air was too small and too long to be efficient. I changed the 1/4 aluminum tubing to 3/8 fuel injection hose, photos two and three show the end result. Maybe tomorrow I will put the other wing on and roll it outside for a photo op!