Thanks Fish, but until I find very bad seats I dont plan to re-cut them.
bertsmobile1 It will just be for checking if I'm not sure they are seating correctly ... if I need to grind them for sure I have to buy the right thin as Boudreaux In Eunice La. suggested : Loctite clover. But I wait the valve removal, for now I see Loctite Clover Fin& Corse (280 & 120 Grit) @ 20$ + 20$ ship on eBay.