Good Quality 'modern' keyboards

I wrote about a hypothetical service to make one-off custom keyboards: Michael Richter wrote: The only way to make the whole thing remotely practical is to do very nearly all of the manufacturing in house, with as much automation as possible. The mechanical key switches, injection-molded keycaps, screws, and threaded inserts would be purchased, but almost else would be fabricated in house from raw materials, e.g., sheet aluminum or steel, ABS filament, copper-clad FR4. I've already got two 3D printers, but they aren't suitable for making something as large as a housing for a PC keyboard. Making objects that large with a plastic extrusion printer is difficult due to the shrinkage of the plastic as it cools. With a smaller object, you can print an entire layer before significant cooling has occurred. A heated build platform reduces this problem somewhat but does not eliminate it.