A friend of mine approached me with a rough drawing of a driveway gate design today. The simplest way to describe it would be a frame and panel design, except that instead of a panel it would use slats or pickets in the field. The design would use a curved top rail and straight stiles and bottom rail. We had envisioned using M&T's to attach the slats to the rails. While it has raised numerous questions in my neophyte mind, the biggest one for now is how I would cut the tenons and their shoulders to go into a curved frame. I imagine that I could establish a line where the shoulder should be and rough out the material in an expedient manner and then work to the line with chisels, rasps, files, etc. Is there a better, more consistent, more expedient way to do this? Did any of this make sense?