Cargo Bikes

Trailer project done. I ended up buying a second hand one from ebay and modifying the hitch mechanism. Seems to be ok. Now I need some bungees and other cargo organisation/securing stuff.
This does mean I've got a spare pair of wheelchair wheels (22" if I remember correctly) that would be perfect for someone else to use as the basis for a trailer. Drop me a pm if you want to see 'em.

can i see a photo of these wheelchair wheels?
I'm intrigued as to how they'd attach to something.
I reckon I could knock out a decent trailer with the time on my hands, plus I need something to do.