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That is also why I prefer O2 in my Damascus, which is why I ship O2 to the people making Damascus for me, even though shipping 10 or 15 pounds of O2 is quite costly. O2/L6 or O2/15N20 is imo the best...

Essentially it is what Mike said. O2 is more forgiving during HT than O1. It is also harder to anneal it, but that is a different problem :)
Additionally, the lack of tungsten in O2 makes it also...

Indeed. I like working with steel from friends. Not only does it reinforce the friendship and give you something to talk about over beer, but it is a good idea to build up experience by repeatedly...

As Mike already mentioned, when 2 steels have similar carbon content, there is absolutely no advantage other than aesthetic. If the carbon contents are different, the result is evened out. That said,...

Check out som of my previous threads here, where I have posted blades with O2 core and Damascus sides.

Damascus like this is made in big blocks using lots of individual twisted bars which are then further manipulated in various ways.

When the block is finished, slabs are cut off running across the...

This razor was made from A slab of steel I cut from the block of Turkish Twist Damascus I got from my friend Ed Schempp. Ed's a senior knife design guy for Spyderco and very good at making Damascus...