Kevin will be surprised to find out that the pervert plumber does more than plumbing and fixing heaters! That said, he will be happy to bring food and refreshments. Hopefully, the technicians won't mind a random butler looking over their shoulders and providing the result of a mathematical equation now and then.

Oh, and if they by any chance choose an inadequate ground to build on, Kevin will let them know in a very smooth and delicate way. They might find mammoth crystals stopping the progress of their machinery or something like that. Oops.