It is a hybrid. The tubes and LC fins come from Semroc. I use a capsule from the Estes kit and usually get rid of the plastic fin can, mount, fins and slotted tubes, replaced with a single tube for the tankage and a shorter section for the motor and fins.

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Gravity is a harsh mistress
SAM 002
NAR 91005
"The complexity of living is eminently favored to the simplicity of not."