I want to build some tube mic preamps on suitable sheet metal (16 ga) aluminum with the dimensions and component layout on a Auto Cad file. I plan to use UTC A series (A11 in, A26 out) or LS 10X in, LS51 out). I've put this project off too long and if I can get the metalwork done, it will be less trouble to build 8 channels and a spare. The individual channels would attach to angle rails inside the console enclosure so no metal bending necessary; just aluminum plates cut to size and drilled for mounting and the components. What costs am I looking at? Bud Industries in Cleveland Ohio doesn't have what I am looking for "off the shelf"...