Customized kitchen island
Not an expert here, but I think any sort of stone/granite/slab top on a 15" wide rolling base would be prone to tipping, even without an overhang.
How tall is this going to be?
Even 27" wide may be tippy. If you want it tall enough for bar stools, dangerously so as people sitting may tend to lean on it or push against it.
Also consider your flooring. The weight of this slab will cause the rollers to leave dents in any sort of "soft" flooring. It will be even more prone to tipping if you have tile with grout lines or any sort of rough flooring the rollers may catch on.
Personally I would not put a slab on anything movable that is taller than it is wide.
I would look at other, lighter-weight counter top alternatives.
Last edited by Blondesense; 10-01-2010 at 12:48 PM.