One suggestion for the clamp that holds the router motor Al. Instead of a bolt and nut use a threaded insert on the far side and a socket headed bolt on the near side, either hex or torx, with a hole in the side of the casing for a long T-handled wrench of the same to reach through. Much faster and easier than an open end wrench.
Someone I consider a master woodworker once told me that a master woodworker is not someone who never makes mistakes. He is someone who is able to cover them up so that no one can tell.