Is anyone blending multiple barrels for consistency? What type of
vessel are you using? Is there some slick way of blending that doesn't
require 500L+ vats? The best I can come up with for a 2 barrel
scenario is:

Pump 1/2 of barrel 1 into container 1
Pump 1/2 of barrel 2 into container 1
Pump 1/2 (the rest) of barrel 1 into barrel 2
Pump all of container 1 into barrel 1

This requires container to have the same or greater volume than the
individual barrels, and assumes the barrels are the same size. How
would this work for 3 or 4 barrels? Thanks! -David