While visiting a friends studio (The Avenue Recording Company) I was happy to notice an old microphone cart I’d built for Tanda Recording.  The cart was designed to keep clutter down and be able to slide between the room partitions.  It was extremely well then and keeps working today.  There are two side compartments that remove and a bottom one for larger items. 

Compartments taken out.  The compartments were great for keeping the mic clips and stere bars etc etc

The bottom case was great to stash round basses and goose necks

A word of advice if you want to build a cart like this: The real trick to this cart is its depth.  We had a similar cart at a theatre I worked for; we were always breaking off adjustment knobs on the bottom of the stands.  If the depth of the holes is too much putting the stands in can snap the adjustment screws right off.

When in doubt: fuck it, paint it black.