So heres the whole story....
I flew it on a 75mm 7600 white ex load.
I DIDNT pin the booster and had drag separation at motor burn out. The rocket survived, fell from 9k feet into soft dirt. Parachute broke free and didnt strip. Drogue chute exploded.
I zippered about 4-5 inches of the booster. Brought it to Wildmans after the launch and gave it a little Jewish snip and its good as new. A 98mm 17,500 case will still fit, so Im good with the shorter configuration.
As for the flour that is just JB weld dust from sanding fillets. This flight was just because the weather was great, it because the rocket was ready.......hence the missing shear pin.