Thanks for the link. Earlier this year I had the opportunity to tour a Northampton factory. I was shown a machine that cut the sole in preparation for a channeled sole, I'm fairly certain this piece of equipment is common amongst those in Northampton that offer a channeled sole, is this a piece of equipment you've seen/used?: Great! There you go...there's a photo of the machine I was talking about. The one I was thinking of was probably an earlier version...I seem to recall seeing a lithograph somewhere...but all I had really seen before was a shoe that had been channeled using a machine like this one. As far as I know, this machine cuts a channel in from the side at a pre-set depth and entirely parallel to the surface of the outsole. Cutting too deep into the substance of the outsole makes it very difficult to keep the channel cover upright when the outsole is being sewn. So...as I think someone mentioned about another Northampton maker...most of the time a channel cut like this is pretty thin. And in truth affords less protection for the stitches than even a properly cut vertical channel. It is better looking than a vertical channel, however, and will fool the uneducated eye into thinking it is a hand cut channel. I took some photos today and will post them to illustrate how I do it and how this same concept--channeling in from the edge or side--can be made much more protective.