Guys, you can keep asking questions and if all of them are answered anyone would be able to figure out how to make one of these. It took 18 months to complete the prototypes and a LOT of work. The inventor is, obviously, going to hold much close to the vest. I will answer a few questions and that's it.
1. The average SKS owner will be able to install it.
2. Two holes, similar to the ones in the "M" and "D" models must be drilled in the stock.
3. The magazine mod is extremely easy and can be done with hand tools.
4. AK magazines are wider than the SKS receiver. To work with AK magazines ANY mod would require modifications to the receiver. NOT a good idea.
That's all the information that I can release to you. The only other thing I can tell you is that I have see it and it appears that it will be 100% reliable and if made from aluminum will last the life of the rifle.
Incidentally, if you don't want to modify your stock at all, and some of us don't, you could easily get one of the "cheapo" stocks and make it your 922r compliant system.