If you don't have a regulator up front, you can run your bottle straight into the asa. Standard trilogies (not SF) were designed to run hpa or co2 if I recall correctly, so I think you will be safe with your tank's output pressure. If it has a gas thru go nuts.
Tell me why I had to be a powerslave.
I don't wanna die, I'm a god, why can't I live on?
When the Life Giver dies, all around is laid waste.
And in my last hour,
I'm a slave to the power of death.