Its late so take this with a grain of salt. If you could somehow put your mash liquid into a giant centrifuge, spin it, then remove/dump the 'water' on top, and then do the same thing with the sparge runnings you would essentially be making extract or and extract like wort that would be added to water after boiling/hop additions like an extract brew. I was just thinking about this because the first runnings have more sugar and they sink. I don't know how you'd build this either, if it would work, or what advantages there would be - but it made wonder if anybody else has weird brewing ideas?
And yes I know I'm an idiot, so lets move on.