I do not have a cutout in my table....but I do have my machine set in!!!!
First I cut the legs of the table to the height I wanted and then I cut out a hole for my machine in a 4 X 4 piece of plywood.
I sanded all edges very smooth and then applied many, many coats of polyurethane.
Very sturdy and I know I would have ruined a table had I tried to cut a hole and put in a shelf!!! I am just not that good of a carpenter!!! But what I have works very well for me!!!!!