Thank you all for good advise!
I will try spot temper and then HSS drill first then Cobalt, see how that goes.
Yes I used a grinder, so it is probably buggered..
Try to get 1075 or 1084 steel and do heat treatment.
Or maybe use a chisel to cut out template and keep the temps down?
Picture added of first knife made from old saw blade, not sharpened yet.
Where do you fellow knife makers source your 1075, 1080 steel?
Cheers
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