Hi Alb,
I made my first one to make sure it fitted correctly, then I used an aluminium bar long enough to make six. I machined the bar to the dimensions of the first one including the dovetail, then sawed the bar into six pieces,leaving only two sides to skim. This is a great time saver, and you will find you need more. Glad you fitted the socket screws, now they look right.
Cheers David