Sometime ago, I designed a basic dust shroud for my table saw to try and improve the overhead dust collection performance over the 'stock' one that it came with.
 
You can view that original video here.

Now that design works well enough, and thousands of you have downloaded the FREE files (still free and on the site if you want to check it out).  Many of you modified them, and made the concept your own.
 
For quite a while now I've wanted to update the design, address a number of pain points and fundamentally see if I can make this already good dust shroud even better!
 
I recently posted my updated video, which you can find here.
 
At the time, I didn't intend to include files / plans for this, but due to overwhelming demand, here they are!

What's included in the download:
 
DXF and SVG files for laser and CNC users.
Lightburn file that includes all parts in one ready to go file.
3D print files for the snorkel (in both 20mm and 40mm), and the shop vac adapter.
CAD files for the rear bracket so that you can model / modify it based on your riving knife.
CAD files for the shop vac adapter so you can modify based on your required sized fitting.
PDF technical drawings for those that want to either create templates or create/modify the design based on their own requirements. 
 
Hardware:
Acrylic and/or MDF are perfect for this project.  You will require 6mm and 3mm sizes for the bulk of the shroud, however some 2mm may be required for the shim, depending on the width of your riving knife.

If you cannot cut or get your hands on Acrylic, you can substitute for clear PVC. PVC is a good alternative and what I used on my original shroud. 

I would also recommend this if you don't have a laser, as PVC is very router and table saw friendly when it comes to cutting.  WARNING: Do not cut PVC however, on your laser.  This is dangerous and should not be attempted.

This project users furniture bolts, sometimes called 'Chicago bolts, or sex bolts'.
These are M6 sized bolts with an 8mm sized cap nut. 

Links to hardware are in the file download.  Note that hardware to secure your riving knife to the shroud is not mentioned, because that will depend on your preference, and/or riving knife configuration.