I am working on a cherry oval table table top with a walnut edging going around the out side. The walnut edge will be 2"s wide. I plan on 4 leaves each 12's wide. Here is my question. When I have done farmhouse tables with a bread board end I usually do a sliding dovetail but do not glue them to allow for expansion and contraction. My question is joining the outside walnut piece to the inside cherry piece on the curved ends of the oval. I have considered using a jig and template following router bit to get the best fit between the 2 pieces, but if I want to cut a mortise and tenon along the curved piece to strengthen the joint is it as easy as just increasing the size of the outside piece and then routing the mortise and tenon for it to slip into? Is this making any sense to anyone but me. Wish I had some pictures.