So yeah I started looking into a L3 design for fun. A 3FNC 54mm min diameter dual deploy canvas phenolic rocket. Three CF fins of 0.1275” thickness that theoretical flutter at M3.45. Rocket is about 189 cm long and 2.27 stability margin. It predicts M2.89 and 36,700 ft in OR. I’m at work on break but curious if any has pushed MAC phenolic tubes above M2.4!?? From what I have read the canvas phenolic survives M2.3-2.4 from others flight data. Is this a feasible L3 project idea? I really dig the light density of the canvas. And price isn’t bad.