(6) Purple PCB Fabrication etc

(6.1) Oshpark and Elecrow PCB Fabrication Service

(6.2) https://oshpark.com/

(6.3) https://oshpark.com/#aboutus

(6.4) https://pcbshopper.com/osh-park-reviews/

(6.5) https://www.wellpcb.com/purple-pcb.html

(6.6) https://www.youtube.com/watch?v=HH3hoeFjS8w