I had to rebuild the tail feathers on my dl50 because the original ones were warped. This time around I used light weight fiberglass and WBPU and a wax paper bagging technique that I learned here. http://www.rcarticles.9f.com/WaxPaper/waxpaper.htm It was quite windy so I wasn’t getting very good flight times but it was launching nice and high and fairly straight. I can’t wait to get this little plane into a Killer Okie Boomer! Come on warm weather!!!!