I have a ScrapBox and I have some pictures posted here:
Forums at Splitcoaststampers
and here:
http://lalattystampnstuff.blogspot.c...r-13-2009.html
I've been stamping for over 5 years now and I can tell you I have a ton of stuff and my ScrapBox still has empty totes. I'm not sure what you mean about the Cricut shelf, but I do store my Cricut inside my ScrapBox and when I want to use it all I need to do is to pull it forward and open it up. There is a place for the cord to go through the back of my ScrapBox that plugs into the wall.
I'm not sure exactly how much weight the shelves hold, but I can tell you that some of my totes are full of cardstock and they are just fine.
Putting my ScrapBox together was pretty easy and my husband isn't handy at all. We just followed the dvd video along with the instructions and we went together just fine.
I have all of my punches in the totes on the right side. My wheels I keep in the small totes on the doors. Trust me when I say, there's plenty of storage!