Now that I started to play with the .177 gun I've discovered that a target can actually be hit using the gun handheld even with just open sights. This was a revelation to me. Now I want to practice getting better at pistol target shooting which I had previously shunned.
After cleaning and deburring, the moving parts were greased and then reassembled. There is a small elastomeric ball That sits under a set screw and presses against the bolt. The pressure is adjusted with the screw and definitely effects the smoothness of the cocking action. I had to take the gun apart a couple of times to make the adjustment. No big deal.