This is my unique Saiga-12C that I have been modifying. I live overseas so this is not your typical Saiga 12 stock model that you would find in the US.
Link to this in Action: http://www.youtube.com/watch?v=8jzCYM_erPE
I made a couple more safety tabs today. One of them belongs to "YeOldTool"
If I am not stopping to take pictures and I already have the tools out, this is maybe 15- 20 minutes per.
I maybe spent an hour to make two of these this time.
You can add a notch to the lever ala Krebs if desired. I have a nifty thing called a BHO that does a better job and doesn't leave my receiver open to the elements.