Shop Vac Adapter for Harbor Freight 40lb Blast Cabinet

I bought the Bauer 3 Gallon shop vac at Harbor Freight to use with my Harbor Freight 40lb Blast Cabinet.  This adapter pops into the back port on the cabinet with the rubber grommet in place.  Just hook the shop vac to it and you're good to go.

I made two versions.  My first design created too much air flow, but it may be perfect for a less powerful shop vac.  To reduce the air flow I created the design with a slide gate to adjust how much air is pulled through the cabinet.  I call it the Air Metering design.  The guides in the side of the slide gate are not dead center so if it goes in too easily, flip it over and try it again.  Also, one side of the slide gate has a flat guide.  That guide goes towards the back of the adapter.  If the slide gate won't go in, flip it around and try it again.

Both designs require supports.  I recommend using the Organic supports in PrusaSlicer 2.6 beta and later.