RE: GP performance series Extra 300sp Flutter
Mine is sitting in the sealed box it came in from from UPS. I agree, 2-56 hardware is entirely too small for a plane like this. Sealing the control surface gaps will also help with flutter issues. Having not yet even so much as opened the box, I don't know know if gap sealing is part of the instructions. In all the planes I've built in recent years, only one came with a hardware package I felt good using.