UPDATE.
Although the gun itself isn't very valuable, it has a lot of value to me because it was a gift from friends.
I elected to purchase Novak sights and have them do the work. I sent the slide off and just got it back.
Novak Designs Inc. did an outstanding job !
I am very pleased with their work and would recommend them to my friends.
Not only did they cut the dove tails perfectly and do a top notch job*
.........fitting the new sights; they refinished the slide. Now the slide was flat black to start with, so it wasn't like they needed to polish anything, but they still did a great job. When I pulled the slide out of the box, the first thing I noticed was the worn surfaces were finished (locking lug cuts, breach face, feed rib, firing pin stop, etc. ) They clearly refinished the entire slide. That was probably overkill and I'm sure they could have just cold blued around the cuts, but it was a nice touch.
AND, they packaged the slide inside of a square plastic telescoping tube and added Styrofoam padding inside the cardboard box.
Attention to detail like that makes the difference between an adequate job and a great job.
I could have spent less money and if it had been some other pistol, I probably would have spent less. But it was worth every penny.
Two big thumbs up for Novak Designs in Parkersburg, WV.
* OK, that was a bad pun, even by my standards - but they did do good work !