I think this is the same guy that made a 100% in-scale AT-AT as well. He also made a full-size Sandcrawler just like this one. The cockpit piece gives it away unless this guy stole the idea from the AT-AT guy. - I used to have (may still have) pics of the Sandcrawler - I'll dig thru my stuff and see.
EDIT: Ok, so now that I read the description, this isn't the guy that made it. Here are the pics I had (can't find the AT-AT ones - but the thing was like 6 ft tall). Not the same crawler, but cool anyway:
The guy made a full-scale Falcon too.