Do some research and get a book on how to make your own countertops. You are able to still include a drop down edge to get the look of a thick concrete counter, but without the additional weight the want to reinforce the cabinetry of yours is actually eliminated. Concrete countertops are designed often in a retail store or on site, based on the inclination of the contractor and also the client. There's not as much versatility with overlays because the structural shape can't be modified and objects cannot be embedded. The bottom line appears to be that concrete countertops are actually an incredibly flexible as well as long-lasting merchandise that any home renovation project can benefit from.