Proper feet for my machine

When I bought my cnc machine, the guy gave me 5 of the round feet in the attached picture. But there are 6 adjusters on the machine. Also, I think he said there should be ball bearings between the feet and the adjusters on th e machine. At the time, I just put the machine down on it's adjusters but it was really too low to have the coolant tank in the proper position. Can someone fill me in on what I'm actually supposed to have and where I might get it?

Thanks.

Edit: By "Ball Bearings" I really meant "Ball Brearing", as in a single large steel ball.

No bearing. Leveling screws just sit on those. Helps to put grease between them. The hole through is to anchor the machine down. Seen this same style on Moris and Okumas.

Thanks, any idea where I might get a 6th foot?

Got a lathe?

Only a little harbor freight 7x10. It would take me forever to make one, I'd rather just buy one.

I suppose any hunk of metal that is in the vicinity of the same height as the others would do...