.303 to 7.62x39 conversion video part 1

Although I didn't get a lot of feedback on the video of shooting this rifle, I did get a couple of inquiries on how the job was done. A picture is worth a thousand words they say, so a video is worth a couple more, I guess.
I know that it's still a bit vague, but those who understand gun smithing will be able to figure things out pretty easy.