Anxious to impress

My newly employed sales man come estimator is anxious to impress me with his knowledge. He has worked in two carpet outlets before so knows a bit about the products and is familiar with pricing. I have heard the sentence before a little knowledge can be dangerous. On Friday we were looking at carpet ranges so he could familiarise himself with our product range. "Of course" he said "these are obviously all 1/10th gauge because you have written it on the label. "No" I said "That was the date they were priced January(1) and 2010 (10). He has worked with me now for two full days and two half days. I have noticed that if I let him run with his over exuberance for the first hour he soon calms down and by the time he has done three hours he is almost in a stupor. I am looking forward to the day he comes in and doesn't try to impress.