Hey...you helped me in the past & hope I can return the favor. I've done quite a bit of research for a new Saiga 410. Total noob, but looks like some "problems" with the 410 have the same resolution as Saiga 12? Take a look at this forum thread:
http://forum.saiga-12.com/index.php?/topic/50571-how-do-i-polish-the-bolt/
Check out Pauly's Custom. There are much more qualified on Saiga-12.com that want to do themselves, but with these critical parts I would want an expert. Have yet to find any negative comments ANYWHERE about his work.
Keep us posted on your problem/resolution.