Can that rack take casters instead of feet? I really need to be able to swivel my rack around to swap equipment in and out regularly. Most swiveling or rolling racks start in the $700 range and quickly move above $1000, and <$300 would be much better for me (especially since I may need two).

While I'm asking, how much weight can the shelves hold? I imagine quite a lot - I see some serious Outlaw hardware on yours. Nice pics, BTW.

-avi