I could not find a roll of 1/4” masking tape anywhere locally, but I found a roll on Amazon. Perfect width for making the aft thrust ring on the F15 motors.

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Lee Reep
NAR 55948

Projects: Semroc Saturn 1B, Ken Foss Designs Mini Satellite Interceptor
In the Paint Shop: Nothing! Too cold!
Launch-Ready: Farside-X, Maxi Honest John, Super Scamp