Mr67Stang - Welcome back! And thanks for your service. For engines, actually, I believe it's the DLE20 that has become the engine of choice. There is one guy who's published installing the DLE 30, but I think he's the only one so far. Personally, I think the DLE 20 is the perfect engine for this plane. It's got speed and power and just fits. I also have the DLE 30, but in a 73" Sukhoi 26m - a much larger fuse, too. I think the DLE 30 is the perfect engine for a 3D plane of that size. Either way, I look forward to hearing and seeing more of your build and flying.