As I noted in my unboxing video, the ring and pinion gear set I ordered was left out of the shipment I received from Drivetrain America. I emailed the company that night (Friday) and received a response on Saturday saying they apologize and it will be shipped out on Monday. On Monday I received two emails: one providing tracking information for my package, and one from the owner of the company himself apologizing for the mistake. I was impressed with their response, and I would definitely order from this company again.
I received the ring and pinion gear set today. Here are some photos.