It boosted my Estes PSII Nike Smoke to 1,818 ft nicely. I used a chute release and altimeter 3 to add a little weight in the front to get just about 1 cal stability. The delay timing was just fine at the full 10 seconds. It should work well for my Estes Leviathan as well. Just keep em light and clean and the 10 second delay should be ok.
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