Originally Posted by
Roy Petersen
I don't think the end result would be what you expect. The flow of air would not follow the shortest path to a DC, but instead one would rob from the other, and both would have less pull overall, along with "dead spots" where the air flow would slow to next to nothing in both directions. In addition, at least with my setup, the wyes and crimps would be facing the wrong way for half that, causing more issues than it would likely resolve.
Be far better off setting them up as two separate runs, just for the closest tools to each end, IMHO.