My contractor works with the countertop place who sold me a Hi-Macs
solid surface vanity. When I wanted a Kohler undermount sink they made
it sound like that was very unusual and they wanted to charge me $150 to
install the sink onto the countertop. What they ended up doing is
making a plywood deck that the sink sets in then the countertop sets
ontop of this. It's not installed yet so I don't know how it will turn
out.

question is...what's the usual way to install a porcelin undermount sink
onto a Hi-Macs countertop? The kohler documentation says "no epoxy" and
to use the countertops recomendation for attachment.