What is that bar across the bed of the machine? Is that part of the table? What happens if you take the legs off?

I have a cabinet with a lift. I can't find an insert for it. I have the PQ1500. Koala doesn't have an insert, neither does Horn (same opening dimensions), and the inserts at Allbrands don't match my cabinet. I don't see why I would have to buy another table like a SewEzi when I already have the cabinet. I have another machine that had an acrylic table, I took the legs off of that and it lays flat but the cutout doesn't make it so using a table with the right cutout without legs would work. The Brother is tight lengthwise in the cabinet, but a lot of room the other way. I'd like to slide the table around to fit the cutout so I can move the machine closer or farther away from me as needed.

I don't like the machine sitting on top of the cabinet, it's too high. The table that came with it isn't flat.