I bet you're loving that Williams peep sight. I'm planning on getting a set of tech sights for the SKS, just having the increased sight radius should help a lot.
I have a receiver cover/scope mount with set screws (so it won't go anywhere during recoil) that works VERY well, but I don't have a decent 1" scope (that is short enough to clear the ejecting brass, or load the rifle) so I don't use it.
I've been unable to shoot the SKS yet, but I have plans for Friday, and I'll be posting a range report for that along with my new AR and my RIA Tactical CS.