That makes sense to me, the ASA is literally just on/off, just don't mess with the needle valve. But that's kind of a hassle. I'm sure ppl are going to say, just get a regulator, so I'll say it too. I got the aquatek for about $100 and it was a great investment.
I will upgrade the system down the road, but this set up was all I could afford. Well, a little more than I could afford actually but you know how this hobby goes.