A small notch was cut into an engine block and some 65 lb. Kevlar tied on with a square knot.
A 13mm engine casing was marked at 1/8". Normally an engine could extend 1/4" out the back, but on some models that could set the engine lower than the tips of the fins.
A great thing about a pre-printed carded rocket, the only thing to paint is the nose cone!
The shoulder was masked off and spray painted gloss black.
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