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got an old 6" mora i've been using for about 20 years on early ice...found adapters (milled aluminum) to "retro-fit" lazer blades to it at a local hardware store the other day...looks like a neat idea...hope it boosts the performance!
I saw an ad on ebay ice fishing for those adapters.
The best way to replace the blades on a Mora is tounscrew the top knob, slide a Finbore or Nils under it and re-tighten the knob (Image removed from quote.)