Lee,

What the heck is a "chook"? Must be one of those down under diseases. I don't have a DA, just a couple of DL's, but at one tank full don't mess with it. Wait until you've got a gallon or so through it. It takes some run in time before they start to smooth out, then tune. Don't run it too lean and don't run it too rich. Too rich and it will carbon up real quick.

Chuck