Heat treating is one of the more difficult things to perfect though it seems like it should be fairly simple.
When you find someone who has worked out the voodoo and has a track record of consistency- you get out of their way and let them perform their art.
PARTICULARLY if you are trying to do things on a commercial level.
Most knife guys are kinda like most of the members here... very picky, very bitchy, very experienced, very picky, and slightly OCD... did I mention picky?
It doesn't matter if DaVinci, Michelangelo or Hephaestus himself did the forge work if the heat treating is bad.
Everything that I have seen from Peters heat treating either on the web or in print has been good.