The Braumeister is constantly recirculating during the mashing process, at the end of the mash you lift the malt pipe and rest it on the supports, during this period most of the sweet water mixed in with the malt drains back into the Braumeister. See second to last pick in Dave's original post. At this time you can do a simple flood sparge if you want to, I just pour about 10 L of 80oC water on top of the malt and let it trickle through the grain. Personally I doubt that it's really a sparge, more just rinsing the sugary sweet water from between the grains.
While the "sparge" water is trickling through, the Braumeister is heating up toward a boil, as it ramps at 1oC/Minute you have a good 15-20 minutes for the bulk of the water to run into the kettle.
I put the Braumeisters' lid on top of a bucket, then just before you reach a boil, lift the malt tube down and put it on the lid, there are a couple of vent slots in the lid. If you are careful you can position the malt pipe so it's over one of the vents and both vents are over the bucket, this lets sweet water drain into the bucket and let's air out. I just leave the malt pipe sitting there for nearly the whole boil. A couple of litres of sweet water will drain into the bucket - just put it back into the boil about 10 minutes from the end if you want to maximise your yield.
One other benefit of doing this is that you're not tempted to put the lid on the Braumeister during the boil! That usually leads to a boil-over and if the lid is otherwise occupied, it's harder to do something dumb (just the once OK)
MHB