Sansoo....Where did you get your wheels on the bottom? I put wheels on my Dewalt planer cart I made up and I put wheels on it like your filter system, but the little tabs to lock the wheels on mine are much smaller and I have to fiddle with them to get them to unlock. Yours look so much easier to deal with because the lock / unlock tabs are much larger. I like that they lock both the rotation of the wheels but also the swivel but mine are a pain to unlock.
---- Yolanda