Dont have time to do the whole thing before work, but this is the basic idea. The center is the spoil board and the outer is the frame. Then the whole thing can be screwed or clamped to your table with minimal damage to the table itself.
Another thing is that you could take the whole MPCNC off of the table and move it to the garage temporarily for cutting fairly easily.
It’s your machine, and everything is up to you. Just sharing an idea.