thx, it works fine.

Do you think I could move enough air running a 12v fan on 6v's, and would I mess up the fan? if I cant run it on one I have to make room for too 6v batteries (which are pretty big) . the chamber is 15" long and 4" in diameter.

it would be exactly the same I think, but just one spark, not a continuous one.

I have a 3/4 in barrel to interchange on one of my current cannons (i assume thats what your using) I use it to shoot those little C02 canisters