You got it, Rube! I was going to edit my post to say that David (WV) posted his good explanation while I was typing my post.
The smallest loop you can girth hitch the amsteel on the better, if you're going to try to make extra wraps to get your adjustable bury as close to the hammock as you can. Remember, though, the extra wraps take space in your loop. And that loop gets small quick. A loop a couple of inches long should do 'ya. Best of luck!
Edit: Gmcttr beat me too! You guys are too fast. Yeah, an inch and a half ought to work! Good luck, friend!