As long as we're talking about it... what's the standard size platform? Like for all the wooden dollies that everybody uses? I've got a bunch of 15 ply birch in the garage and I'm going to be cutting some up tomorrow... may as well make a dolly while I'm at it.
http://www.dvxuser.com/V6/showthread.php?t=62531. Its not the industry standard, but its still works very very well, even when it was made for 60$. Any good single-direction mic wont pick it up.