I made this to prevent my bucket from collapsing under a vacuum while blocking the end of the hose while using the Oneida low profile cyclone and a 5 gallon bucket.
Scale to fit your exact bucket. Mine was 11" and I beat it into place for a tight fit down the buckets internal taper.
I included screw holes on the side if you needed to screw it into the bucket. I didn't end up needing to.
The author marked this model as their own original creation.