Just finished my Black box Vac system, and am so far very happy with everything.

I used the open source files posted here, on the site, thank you to everyone!

I chose a 4 zone system and am getting around 9HG best case scenario with all 4 zones opened and a full sheet on the table to cut. My question is, when I close off each of the zones one at at time, leaving only one open, HG goes up. Without understanding too much about the characteristics of airflow, because I am flowing air through a smaller cubic volume the HG is going to go up, but will it have any negative affects on a 4 vac motor setup without baffles? I am essentially just making the 4 motors pull through a smaller hole right?

I haven't noticed a spike in temps, but did not want to run this way without verifying first. Thanks,