@toolboy has a similar setup, I also made a similar one as I described above. It took me over a year… and it’s still not 100% done. I still need to add the expanded metal shelf. I probably should have just bought the leveling casters as @TortillaMan suggested but I have a disease that makes me think I have to reinvent/or make everything. It was a fun project.
I put all the plasma cut components and a description on fireshare. It has been working well. The control box does get in the way a little on the one corner but I can still get the impact on it.
Edit: should have said leveling feet… not casters. Thanks @manoweb