I am attempting to build my first chair and need help on how to cut mortises of the bottom of the top rail and top of the bottom rail. The rail is curved and therefore there is no straight edge for a router or mortiser to register to. One way to do this would be to make a template and use a router with a bushing. That would be somewhat difficult since the mortises track the curve. In searching for answers I found references to how easy this would be with a horizontal mortiser but I can't visualize how that would work. Anyone ever do this with a horizontal mortiser or have any ideas on how to do this? Thanks.
Woody Dixon