What can I use in place of the tubes if I don't have any ce2's? I can always use an old atty for the connector, I already took apart a couple and they still have wire leads on em
If you have any old carto's try pulling the center contact out of one. I think the air tube will be close enough diameter for you. Maybe......

OOPS did I say that? 8-oruh roh there went my free modding time for a week...