She Who Must Be Obeyed was still asleep, so I decided to press on with the DAO hammer install.
The DAO hammer I got from flea-bay must have been new-old stock. It was absolutely pristine, with a brand new hammer nose and a double action sear that had never been fitted to anything. All this meant that the double action sear was miles too long and locked the action up solid as soon as I installed it.
Swapping the double action sears between the old and new hammers brought everything into minimum spec and produced a very smooth hammer let-off with just a touch of a stone to the trigger bevel and double action sear.
Then I said the words that are the bane of every car, gun, and woodcrafting person: "As long as I've got the tools out......"
The rebound slide and it's corresponding frame area were stoned, the spring recess inside the rebound slide was deburred, the cylinder stop was cleaned up, the trigger face was smoothed and rounded, all the burrs on the bolt were removed, the sharp edge around the frame was smoothed out. Everything went well until it was time to shorten the strain screw.
I locked a file in the vise, chucked the screw into a cordless drill motor to spin it against the file, and the battery in the drill motor went kaput. Swap the battery.....and that one was also almost dead. Why should this be different. With a silent plea to the emotional support llama I pressed on with the screw turning at about 1 revolution per minute. When the battery in the drill motor finally died, the screw was
exactly the correct length to produce 48 ounces of hammer tension.
With the shortened strain screw, a Wolff hammer spring, and a Wolff 11 pound rebound spring, we ended up with exactly 7 pounds on the trigger pull scale in double action. The key to the 11 pound rebound spring seems to be the interaction between the trigger and the cylinder stop. The reset path for the trigger has to be really slick for that light of a rebound spring to work properly.
I've grown to like the new style thumbpiece that Short and Sweet has, so when it was time to put everything back together Short and Stout got one too. The stainless thumbpiece looked like the proverbial diamond in a pigs butt against the nasty looking frame.
So now we have a smooth action, a bobbed DAO hammer, a spiffy new thumbpiece, and a frame/cylinder that looks like it was dragged behind a truck.
"While I've got the tools out......"