I apologize I can't please everyone. It's not for lack of trying. Some people just need to buy a kit and be happy, and some love to build Spads. That's what's cool about this hobby, freedom of choice and plenty of options. The prototype Corostang took me about 6 hours to design and build, and is a very sweet flyer. The plans on the website took several evenings of my free time to do. They represent how I built mine, and were put on the internet with the intent that anyone could view them for free and do with them as they please. As for the tail not having any angles, sorry about that. I cut it out without anything to measure anything. I just made it look about right. I took measurements later. Spads do take a little free thinking at times, and I have no education at making plans or writing instructions. I just do the best I can. I'm sure there are plenty of people that would be glad to take any coroplast off your hands that you have left over Ace Bogie, and good luck in whatever you choose as your next project.