a tip from one who has done it
I only use 2 1/2" flex hose for the router table, hand routing, and handheld sander. I use the 4" flex hose to hook up to the table saw, bandsaw, and planer. The 4" line picks up more dust.
No matter what, the table saw is going to throw a lot of dust at you from the blade. I'm slowly working on adding a 2 1/2" line for over the blade.
If you split the 4" into an additional 2 1/2" you will lose efficiency. I used a shop vac for my over the blade dust collector because of its high velocity air flow in a concentrated smaller area in addition to the 1 1/2HP Jet DC with the 4" port at the bottom. It worked just fine. The combination of a zero clearance throat plate and an over the blade dust collector will be good. I don't think a standard throat plate works all that well with just the DC on the bottom port and it is not really as safe as a zero clearance plate.
My "must have " safety accessories are:
Outfeed support table
Riving knife or splitter
Zero clearance throat plate
Additionally, I like a 2 position fence like the Delta Unifence, for working closer to the blade than a tall fence will normally allow, making more room for a push stick or your fingers when required.
Ya gotta know what you are doing when working between the fence and the blade with thin rips, and using the proper push er makes a huge difference.
The answer to your question will only be as detailed and specific as the question is detailed and specific. Good questions also include a sketch or a photo that illustrates your issue. (:< D)
Last edited by woodnthings; 07-25-2017 at 07:58 PM.