Here is something I thought you guys might find helpful if you ever run across one of those nice round metal clothes hangers at a swap meet or something. I actually got mine as it was left in the garage by the previous owners. When I first saw it I almost gave it away but then I noticed how heavy duty it was and thought "Mobile Clamp rack here I come" I used these casters from Amazon since they are meant for a lot of weight and have a locking mechanism: [SIZE=78%]http://www.amazon.com/gp/product/B0000DD1EG/ref=oh_details_o06_s00_i00[/SIZE] I was lucky as the feet that were at the bottom corresponded with the mounting holes on the casters and the added 2/4's on either side were used to secure the other side. The 2/4's on the bottom were also used to secure the round MDF plate I made which was sealed and a great place to put my glue and what nots. Now I can move my clamps right next to were I am working and save a lot of time.