I haven't found an obvious use for it...
Not just me then, I think the problem for me is getting the linear rails long enough to make use of the rack.

I just bought a display cabinet off Ebay, similar to the ons you see in big departmental stores. L shaped 30" high at the front counter bit with a 5' display unit at the end. Paid £50 for it.

Doesn't sound impressive until I tell you it was made from 45 x 45 alloy extrusion with all the corners, brackets bolts etc needed to hold it together.
Luck bar steward, thats alot more useful then my find...oh well

Bit wacky, but I was looking at the back lawn the other day thinking - wonder if I could make CNC lawn mower with rails along the edges moving a mower around
Your a genius.. CNC lawn art, you will make a fortune. (P.S what medication are you on?:heehee:)