An important thing to keep in mind is that the Q2G2 takes a very small current to fire, small enough that the estes launch controler will set it off during continuity checks. To see if this is the case with your club's system, hook an igniter to the system, and do a continuity check. If the igniter doesn't fire, you're golden. I've gotten back into rocketry this past year, after about 8 years away from the hobby, and found out about the Q2G2 pretty quickly. At first, I used them religiously, but then I started to realize that at my club's launches, there isn't much point in using them most of the time. My club's system is perfectly capable of firing the estes igniters, which are more cost effective. However, the Q2G2 is nice for airstarting, and for use in tight spaces. In my opinion, you need to do the value engineering- find the most inexpensive product that meets the specification.
The Devil's in the details, but so is salvation.- Hyman Rickover
NAR L1 #93203 SR
MASA #576, Secretary-Treasurer
Millwrights and Machine Erectors Local 548