[Vizcaster]

Mick - good find. I have the Japanese set from Luthier's Mercantile International which is great except one file is too small so you need to buy an open-stock .028 file separately (I seem to recall the one file in the LMII set is .024 which is too tight for the .026 strings in many sets). The set you found solves that problem.

By the way, Scub, the knife-edged profile of the middle of the body of the Stew Mac files shouldn't concern you - remember the important part of the slot is that half-circle that the string sits in. If the slot is any deeper than that then you should be filing away the tops (removing the peaks between the valleys) so the string sits partially proud of the nut surface. I think the photos on frets.com are the best explanation of what you're striving for on shaping a nut.

I prefer a full gauged set, but I'm a tool hound. Some carefully selected double edged files will also get you by so listen to the guys who have done it that way successfully. Kind of like jewelry, decide how much you want to spend before you go shopping and chose accordingly (then again for some reason my wife gets jewelry that meets or exceeds the cost of my last guitar - gotta stop doing that).