I want to install a barstool (42 in) height eating area. I think the minimum overhang is supposed to be 12 inches. Is it supposed to overhang a little on the other side or would it be flush? There will be some base cabinets and a stove on the other side. I'm just planning on framing a half wall out of 2x4 and adding drywall to the front and back. This will give me a thickness of around 4 1/2 inches. Is that sufficient, or should I frame it out of 2x6 lumber?