Welcome to Glock Talk, brother Geezer!
You didn't go into specifics on strength loss, so I'm going to assume that it's mainly in grasping strength. A few suggestions there:
1: If running the slide is a problem, learn to run the slide with the gun almost upside down, and the rear sight hooked onto the edge of a sturdy belt or holster. Push the gun until the slide retracts. Then let it snap forward with full spring pressure. YOU WANT TO DO THAT WITH THE MUZZLE DOWN 45 DEGREES AWAY FROM YOURSELF IN A SAFE DIRECTION, AND YOU WANT TO PRACTICE IT EXTENSIVELY WITH DUMMY AMMO BEFORE TRYING IT WITH LIVE CARTRIDGES.
2: A high, rugged rear sight with squarish front works best for this. I'd recommend the excellent 10-8 Glock sight designed by Hilton Yam.
3: I would also warn you that the 3.5 lb. connector is not a great idea in a self-defense gun unless mated with the NY-1 connector. You can find extensive explanation why in a search on 3.5 lb connectors here on Glock Talk, and I believe some of that material is stickied at the top of the Carry Issues section.
Give this method a try, DRY, and c'mon back here and let me know how it works for you.