OK so I have been lurking here on the site for some time and this is my first instructable. This was my second launcher the first was a modification of the one from "This Old House." I used a ball valve instead of the complicated zip tie design. No offense to that design, but it just seems a bit m...By: d2theyo
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Source: http://www.instructables.com/id/Quick-Change-Electronic-H20-Rocket-Launcher/
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