Using the hose the way I did it was a 2 man operation, I just bought 54' of hose (what was left on the reel) and went to the ends of one wall and marked the water level on both posts, had the wife sit and watch the level on one end while I took the other to as many posts as the hose would reach and marked them, then moved the hose to the other end where I started and marked the rest of the posts... kind of a pain but I think was easier than the transit I have...
Here's a couple pictures, one from Sunday night and the other from tonight, I got most of the perlin supports up tonight, need to cut a bunch of perlins to length (they are all like 3/4" too long) tomorrow and go from there...