[tater134]

Another issue with the rifle is that the safety, when moved over to the "fire" position, won't move back to "safe." I've taken the bolt apart, cleaned it, lubricated and reassembled. It will move readily between pointing up and also to the right. As soon as I rotate it over to pointing left, to the fire position, it resists any movement back. Any tips on remedying that issue would be appreciated, particularly if shooting it is a possibility.

Thats a pretty common problem with mauser safetys.You may just need to file a little bit on the edge of the cocking piece where the safety touches it or do some filing on the safety itself.If you look around on the surplusrifle.com forums there should be a tutorial that does a better job of explaining it.