So I did some digging into that co2 question.
Typically only an issue when large amounts of co2 are being expelled from the tank. I'm only doing 1-2 drops per second, so the liquid theoretically turns to gas almost immediately.
Additionally, these paintball tanks apparently have some sort of siphoning fail-safe built into the tank itself which ideally would help reduce the risk of this happens when in use with a gun.
I've been using it this way for close to a month now, and the tank/regulator don't even get cold. I think it's ok!!