The cart we have is the plywood cart that floats between the hack room and the hallway. It isn’t ideal and requires moving the middle shelf and making the top bigger. Starting over might be a better idea.
We did have plans to keep the computer and monitor on the cart as last minute design changes happen. Other ideas included a thermostatically controlled vent fan. Filtration probably isn’t needed as odour hasn’t been an issue. We expected the printer to smell way worse based on the online descriptions.
Ultimately the design will be what the person who wants to put in the effort says it will be.