Coopered Door Cabinet - Joinery to accomodate knive hinges (semi-long)

Once again I've overcomplicated things and got myself in a bind. The quick and dirty router bits cabinet lead to coopered doors, which, in turn, lead to knife hinges.

(OK - so I'm a glutton for punishment)

Since I've got the JoinTech Cabinet Maker router fence "system", doing stopped sliding dovetails is relatively easy. And sliding dovetails let you put things together that will hold themselves together without a bunch of clamps or brads or even any glue - and are easy to take apart. They're also a strong way to join two pieces of wood together.

SO - I joined the sides of the cabinet (along with some of the internals) to the top AND bottom of the cabinet with sliding dovetails. Only after dry fitting everything together and setting the coopered doors in place did it become obvious (to me) that the top AND bottom couldn't BOTH have sliding dovetails.

Here's the problem with illustrations (all one line so watch the line wrap)

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can recut the male dovetails on the top or bottom of the sides and make them into "tongues" (tongue and groove) or tenons then make a new top or bottom with a stopped dado or some mortises. or I can cut off the top or bottom dovetails and bisuit or dowel the sides to the top or bottom (or pocket hole screw the bottom on since they won't be seen).

The cabinet's going to go on the wall with a french cleat so there won't be much weight for the bottom to support.

Joinery suggestions?

and any tips, hints etc. on installing knife hinges will be appreciated.

charlie b