This set is cool, the guts are under the top so you can lift the hood and tinker with it easily. :D

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=73374&item=6121762181&rd=1

I saw that one! Looks pretty cool. IIRC Setchell Carlson had a modular chassis I think they called "Uni-tized" and I believe they were built with removable sections. I'd love to get it, but the opening bid is a tad high for me.......