Neil:
I don't know if Quest is offering another type 9volt contorller but All the micro-Max silo systems come with a built-in 9volt hand controller.
Last year we ran a series of tests with different bands and types of 9V batteries to see which one would give the "Most" launches from a single battery. Druacell, Everready, Rayovac, and the HI energy 9V's E9 and duracell max. were also tests.
After the suprisingly low nuimber of igniter burns to failure from ALL the 9V's I contacted duracell and spoke with one of their Engineers.
The Long of it is, when a 9volt battery is short circuited (like your igniters do) it really destroys the battery in very short order, my beloved duracell max only got 6 to 8 burn-thrus before it wouldn't even make the 30ga bare nichrome glow red. the E9 energizer did double that but not by much.
As you can see unless you carry a pocket full of batteries with you the 9volt system isn't much good on a "day long" outing.
All my Micro-maxx launchers have been converted to 12volts system by soldering in a by-pass the allow connection to a standard gel-cell.
a quick way to is to make up a snap on drop by taking apart a dead 9v, soldering a 5 or 6 foot piece of 2/18 lamp cord to it and adding a couple alligator clips. The controller will handle 12volts with no damage to the built-in buzzer or lights. I've been using a modified system for a couple years now. Heres a pic of the controller and made up drop.
hope this helps
PS: I did a pictorial HOW TO on this conversion that's located in the MicroMaxRockets yahoo gourp files section. shows exactly what you need and how to make the conversion
