I was fortunate enough to win his Christmas giveaway: a Model 150 Standard Tanto in K-100 tool steel. Do a search under Reviews and you should find my report. Ivan does beautiful work: the grind is perfect, not a flaw anywhere; the handle wrap is as functional as it is beautiful. K-100 is the equivalent of D-3, very difficult to grind but outstanding in edge holding. You could shave with this knive (at a 35 degree chisel angle) or chop through a 2 x 4... or vice versa. Ivan was quick to answer my many questions and the Christmas surprise arrived exactly as promised. You won't be sorry dealing with Ivan, IMHO.