Gthirteen:
In regards to your need for shelves that are larger than the Target, I actually use a larger granite shelf on my top shelf of the VW2. It's pretty easy to do, just get some cones and you can put whatever size shelf you want on the Target. (You can see it in the picture of my turntable on my "system" page). The only thing to be careful of is to not put the bulk of the weight on the front overhang. But as long as the weight is primarily over the usual shelf space, I don't see a problem.
As I mentioned, I have a 60 lb. granite slab and a 48 lb. turntable on the top shelf, with no sag or problems with the weight. I did use 3.5 inch lag screws of the largest diameter that would fit through the mounting holes in the Target (not the stock screws that come with it) and made sure I mounted it securely in the center of the studs in the wall. It has worked flawlessly.
So, that's one idea for getting the shelf depth that you need.