I strongly recommend that you use the "less messy" method and stay away from draining via the banjo bolt unless you have a torque wrench set to 26lbs. and new washers. It is very easy to over-torque the washer. If you over-torque the washer, the washer will warp, and you'll be starting all over again. The angle you have to take from up top makes it very difficult to judge the amount of force to put on the bolt.
USE A TORQUE WRENCH!
Good luck guys!