Hey Dorky D,
It's always a good plan to leave yourself a backup. I've been toying with this for a while. I'm tempted to buy a slip on retainer, but if it was doable, I'd rather do the gas block and fsb so I could throw on a standard retainer. I've heard a bad report from a smith I know about how hard it was to press the parts on and off. He's done a lot of other AK, FAL and HK but said he would not do the job on a Saiga again, but I wonder if he didn't drill out the dimples first or something stupid like that. Maybe he's not as "qualified" as I thought.
From what you and others have said,