I'm assuming you bought the 2HP DC? What is the length of your run? The number of drops and what diameter are they?
I have that DC. only a 20 foot run with 2- 4" drops with gates, 2 2-1/2" drops with gates.... 4" and 2-1/2" pairs. One pair at 10', other at the end at 20'... I used 4" ABS for my run, and used 4" abs tees. Adapted the 4" ABS drops to DWS. from there to hoses.
I have a trash can cyclone separator before the DC, then a cartridge filer in place of the filter bag.
That DC would not keep up with my TSS saw. It has a 4" DC and the base, 3" on the overhead guard. I had to mod it with a 12" impeller to up the flow. Then have to use a cartridge because the mod and increased flow cause too much back pressure at their filter bag (not enough flow through it). The vacuum itself stock was less than 7 water ". Afetr mod... if I use a single 1-1/4 hose to a smaller tool, I have to partially open another gate to keep from callaing the drop lines or my HD metal trash can separator.
Let me explain what Duane was implying about changes of diameter ducting. DC's work through flow rate to keep the particle suspended until they get to a separator, where the particles then lose suspension. That is why separators work... the flow opens up in diameter, a cyclone swirl effect, where the particles move to the outside, where it loses speed and drops out of suspension. You get from a 4" inlet in the separator, at an angle to cause a swirls, into a large area... and there is varied speed of flow from the center to the outside diameter.
Say you start at 4" duct at your table saw. You get to the 5" duct... and you will lose some of that suspension. True, overall, the flow will be the same throughout, because you have nothing less than 4" but the flow rate will still vary between the two ends.
Now, with a small DC that was over-etstimated on it's flow... something like that will lose some of your effectiveness where it might effect your flow... or not. If a short run run, you might not even notice...
"Don't worry, I saw this work in a cartoon once."
"Usually learning skills and tooling involves a progression of logical steps."