I just bought my first set of serious knives (3 piece Shun classics). Sales guy suggested getting the matching steel. Didn't say it was necessary but said he matches his knives w/ the manufacturer's steels. I felt like he was just trying to sell me another item. Is there any truth to matching your steel? My current steel is from a Calphalon set. My old calphalon's aren't forged or anything. My primary concern is if my calphalon steel will harm the Shuns. Thanks!