Dust Deputy's work great, don't they.
I have one on a larger re-purposed whole house central vacuum unit in my shop with the pipes run through the shop walls and ceiling, but I had to go with a 20 gallon metal barrel because the vacuum level was so great that it was collapsing the plastic buckets. As a temporary fix, I stacked 3 of the same style bucket together, equaling 3X the wall thickness of the top bucket to eliminate the collapsing until my son found me the metal barrel. I use this vacuum system for all of my lower dust producers, like scroll saws, drill presses, sanders, and hand held tools.
Your setup looks much more compact than other designs that I've seen. I hated my plastic shop vac, mostly because it was so light and tipped over easily. With a metal vac and real casters, your system should be much more stable than what I had. After getting my central vac and Dust Deputy installed, I gave my son my shop vac.
Central North Carolina