Mike, the quad DCOE set up can be a really nice fueling system - both visually and functionally.
One thing to keep in mind: having four DCOE's is not sufficient in itself. For the thing to run properly, you need four DCOE's of the same configuration. In other words, you need to ensure the numbers that come after "DCOE" (such as "9" or "13" or "152") are all the same. This is because these numbers mean (among other things such as jetting) the size and relative position of the progression holes drilled in the side of the bore. The relative size and position of these progression holes is the primary way AFR is controlled between idle and WOT. The jetting also has an impact here of course, but the primary means AFR is controlled in part-throttle is by way of the size and position of the progression holes. Bigger holes, and more holes, placed in proximity to the closed butterfly means a much richer progression off idle than small, and fewer, holes....just for example. The number after "DCOE" correlates to the particular progression hole configuration.
With multiple weber configurations, half the problems people experience with tuning are related to not having matching series webers. The other half of problems relates to poor linkage (as JacMac pointed out). The black art of tuning webers really isn't that complicated once you have matching webers and good linkage.
If you're really interested in understanding how to work with multiple webers, best thing to do is read Pat Braden's book - "Weber Carburetors" (available on Amazon). Everything you need to know is in there.
Good luck!