The Nicholson files can make very good knives. They can be annealed enough to drill, using cobalt bits, file, and work with by simply heating to a red-orange and let air cool. Canola oil, or ATF at 125° will give a decent quench. Of course, not the best, but close enough. I would go for the canola given a choice. Quench at a red-orange heat in dim light. Do not bother with a magnet, you need 50° to 75° more heat above non-magnetic for quenching. A 2 hour x 2 at 450° temper will produce a blade with very good edge holding properties and yet be pretty tough. I would nix the 01. It is not a simple heat treat. 1075/80 would be the best choice for the home craftsman with simple equipment, as it is nearly foolproof in heat treat, but the Nicholson files do very well also.