I ran into this problem a few weeks ago. I was thinking I'd add a camera on top of the VS someday, so I wanted to run wire. I "had" decided on Home Depot conduit and actually cut the piece for the job. However, the weight of the conduit was significant compared to the VS itself.
Instead, I elected to just use grommets. I placed a wire in there for a pull thru, but will probably replace that later.
See picture below:
http://img166.imageshack.us/img166/3861/dsc01082pg9.jpg