In reply to TobyA and ACC:
Had it a bit too long for warranty, but it looks as if it was just a compression fit (if there was supposed to be a spot weld is was missing on mine).
I have contacted the place I bought it from, but also not heard back yet.
If I cannot get a spare adze I will probably just make one from a piece of stainless steel and weld it into the slot.... Anyway, it is just my emergency hiking/ski touring axe, for proper mountaineering where the adze may be important I have several proper, T-rated tools.
CB