They do a poor job of setting the sinks. Sink recently came loose. Took it out and used a wire wheel on a RA grinder to clean off top surface and a razor scraper to clean off the old adhesive on the bottom of the Quarts top.
Used Permatex PL3 to set it and shimmed into place. Next day I caulked the exposed edge with clear adhesive caulking. I also added supporting pcs of wood to the four corners as they should have done at the factory.
