Eugene- You do not need to buy a "Special high speed bit". Any bit of the correct diameter would work..for that matter when you are ready to innoculate, should be around late Feb. or March, I'll send mine to you. It really didn't cost much, but it is small and will ship easily . It is suppose to fit in a small hand grinder.
Last year I waited too long before cutting my logs. Sap was already going up. Just one of my many goooofs last year