I really don't like the original vacuum adapter for the Bauer 4.5" Circular Saw. It's incredibly flimsy, bends, kinks, gets caught, and overall just isn't well made.

This is just a simple adapter to go from the saw to my Rigid shop vac with a ~45mm hose.

I highly recommend that you print this out of TPU. It just fits into the tool better, doesn't break at the layer lines, and is heat resistant (for if you forget your tools out in the sun).