I recently built a GP U-Can-Do-3D and I like it more than anything I have flown. I am building a DP 330 Extra and I hope to like it as much. But for the ease of construction, quality of kit, and flying characteristics, I consider it a real winner. It is primarily a 3D plane so you don't want to fly it too fast. I use triple rates to make it as tame or as wild as desired. I also love the one-piece wing. I've heard of people building it in 6 hours. I recommend a .91 or 1.00 four stroke. I use an O.S. .91 and had to use a Cline regulator due to carb being lower than tank with inverted engine installation.