i had this router table mounted on a cabinet that racked severely due to the thin face frames that weren't adequately strong enough to support the weight of the table and its four routers so i got some kiln dried 2x4's and lag screwed everything together and used exterior grade plywood for the top and bottom and mounted swivel locking wheels from rocker's along with some new router switches. i had previously used two swivel wheels and two fixed wheels which drove me absolutely CRAZY because it was annoying as anything to try to remember which way to steer the cabinet which groaned with every turn. the open frame design will also make it easier to run dust collecting hoses up to the dust collection ports on the top which i was unable to utilize previously due to an error on my part in not factoring in how large the router plate for the panel raising router would be