i feel like the outside part of the button is part of the case, and the button has a little hat thats attached to the inside. i added the little watch band holder tabs.
im thinking of printing it in the plastic and making resin copies with a back that can be glued or screwed on once the guts are installed. it'll be the easiest and cheapest. you can spraypaint or something to make it look metal. if someone helps me and can find a place that'll CNC aluminum cheaply, then cool...
i can probably sell the resin ones for like $25-30 i dont really know how much or what people will pay/what its worth