I've used the Q2G2 igniters with my home built launch controller and they work great, especially for clusters, due to their longer, more flexible, and insulated leads. I use a so-called super-bright LED as a continuity check, and limit the current to 10mA.

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Paul
If we weren't all crazy, we would go insane - Jimmy Buffett
NAR #87246 www.wooshrocketry.org