Frank, instead of epoxy use tite-bond (carpenters glue), epoxy or Acraglas makes dark line when it dries, the carpenters glue will not. Since you have access to a milling machine, try using a floating tenon instead of dowels as it will give you a stronger glue joint without any increase of weight.

Jim

I learn something every day, and a lot of times it's that what I learned the day before was wrong