First off, with 2.96% carbon (Yes, I did have my friend on the phone check this about three times--until he became so irritated that I thought he might hang up!) I figured that one quench from orange would result in a shattered edge the first time it was stressed, second, I assumed that an alloy so high in chromium would present greater adhesion problems under stress as a consequence of oxidation which apparently never took place.  These things never became problems, and I'd like to explain why... and I would too...if I had the slightest clue, but in the words of a wise man (Frank) "Hey, who cares. It works.".  Make no mistakes, though, these electrodes do have their little quirks.  As with any electrode build up if you try to work on an existing fine edge, the edge and electrode will end up on the floor in blobs.  Fig.2 illustrates a technique for hardsurfacing  an edge using a firebrick for support.  In this way the hardsurfacing alloy can be puddled for easy build up.  Care must  be taken to compensate for any build up of slag at the leading edge of the puddle, which can deform the lower surface of the puddle as it cools.  Also, this alloy does not like touch up after the puddle has cooled.  Hence, any repair must begin by puddling the entire hardsurfaced edge.  Such sensitivity to unrelieved stresses are understandable in an alloy of this hardness.  Moreover, very heavy build ups should be avoided for the same reasons.  Where possible using a positive (reverse polarity) electrode is recommended, to limit the mixing of hardsurfacing and base alloys.  This isn't so much a matter of avoiding some metallurgical disaster, as preserving the purity of  the hardsurfacing alloy, since the positive electrode will transmit less heat to the work and limit base alloy liquification.  Fortunately, despite the enormous percentage of chromium and the shallower penetration of the reverse polarity, adhesion has not proven a problem even in the presence of a small crack running from the edge of the hot-cut into the base alloy (You didn't think I just figured out that part about the hard-surfacing alloy not liking to be repaired without actually committing the blunder myself did you?).  Because the working hours on the hot-cut are, as of yet, limited, I can't say whether the crack will shorten the usable life of the edge.  This however, only serves to point out one of the most attractive features of this construction.  For while the edge maintenance promises to be low indeed, either grinding down and re-hardsurfacing or, with a little more skill, liquifying existing hardsurfacing alloy with the arc of the new hardsurfacing rod while laying down a fresh supply, should be considerably less drudge work than re-profiling the entire tool and loosing tool length because the edge is not replaceable.