To get a razor edge on my Delica on either 40 deg or 30 deg. I have to turn the knife ever so slightly towards the middle of the sharpmaker (away from the stones) I am not hitting the edge on both sides of the knife due to the sharpie trick. Is this bad technique and should I stop this? Is this telling me a re-profile is in effect and I need to buy the diamond stones. This seems to be the case for my Delica and Endura.