Summary

29mm 4 fin can for phenolic body tube with screw on retainer

Instructions

Print the screw on retainer in ABS or a heat resistant filament.
Print the fin can in any filament.

Glue a 29mm phenolic body tube into the fin can. Attach nose cone, parachute, etc.

If using an Estes black powder motor, you will need to add a thrust ring with tape on the nozzle end of the motor.

Put motor into fin can and screw on retainer.

I have had many successful flights with this design;. however, I have not tested it beyond an F motor at this point in time.