I would ask Maksim as he knows better than I would. I know quite a few who have had great experiences with that stone myself included. Anything that has lines in it I would avoid as these may not be felt at the moment but if the stone is lapped they could damage the edge in the future. Alex Gilmore is someone I have heard who is very knowledgeable and honest. He is a member here so worth looking into. He has sold a few stones to people I know and they all have good things to say about him.