Magohn,
Please check to make sure that you will not pinch that front brake line with the fork fully compressed. That line should be run underneath the bridge and out the front then up to the lever. They ran it behind the bridge between the stanchion so it might get pinched between the fork crown and bridge with the fork fully compressed.

Also some forks come with a little rubber gasket to help you measure sag as described by SStorkel. If yours did not just place a ziptie on the stanchion, then when the fork is compressed it moves the ziptie. Then you can measure to the tie vs trying to get a measurement while you're actually on the bike. It also helps to leave the tie on for a few rides so you can actually see how much travel you are actually using on your rides.