Got a Loop 3, Cinch, or Membrane Connector? The D-rings were hand made here in Portland at Custom Spring Products. Typically, CSP isn't making camera strap parts; they are a major spring supplier for both Boeing and Airbus (the spring in the seatbelt buckle you wore on your last airplane ride? probably made at CSP).
Today Kevin and the CSP crew were setting up an old, cam-driven spring forming machine to make the springs that counterweight the door of the Boeing 777. Not a single computer runs this thing, it's all cams and gears, timed to absolute perfection to wind this beefy spring. Also, best on/off switch of any machine ever: