The way I see it done often is to put a substantial bed of plywood down (3/4 -1") and level that, then the stone on top of it. The ply extends over the counters and stabilizes the whole thing. That thickness of ply on a sizable counter may seem expensive until some electrician comes by and break dances on the thing and it cracks.... But that is all after some cool template making with veneer stock strips and a glue gun.

We have some sythetic (rock-hard)tile on the CT's now in our getto phabulous Kit, it too it hard to put things gently on. The wife and I may demo in the near future and she wants butcher block w/ accenting stainless back splash and drawer fronts to match the undercounter fridges. I plan to do the whole thing myself. [Linked Image]

Mark Heller
"Well - I oughta....." -Jackie Gleason