JLC ??DECEMBER 1991 Doormaker Grant Taylor mortises a jamb with a jig made from scrap plywood. Faced with an expensive, custom-made door blank, most carpenters feel at least a twinge of anxiety as they cut the door to length, start to bore into the face for a lockset, or plunge a router into the edge for a hinge mortise. The three jigs in this article can simplify layout and ensure the accuracy of hinge mortises, lockset holes, and undercuts. Site-made jigs can streamline door hanging with speed and accuracy I run a small custom millshop in South Acworth, N.H., that specializes in custom doors. We provide pre-hung packages, so I end up mortising a lot of doors and jambs. I do each mortise with a jig made