OP, I hear you about neuropathy. It is slowly starting to go numb in parts of my left arm and hand, all due to a syrinx the neurologist found in the middle of my cervical spinal cord.
I like the Wolff spring kit. With one you can get a set that has a few different rebound spring weights allowing you to tune the gun to your preference. I have used a bunch of them in my S&W and Ruger revolvers.
I bought the same type of used Model 64, mine was pretty cosmetically challenged when it got to me. I put some newer style grips on it, knocked down some of the scratches and painted the front sight white-then-orange to help me see it.
(The Model 64 with its .357 Mag cousin, a Model 65.)
When I took the side plates off the gun and removed the rebound slide/spring I used 1500 grit wet/dry to smooth all sides of the rebound slide and also the shelf it slides on along with juuuust touching the areas that move together to make them glass smooth. (Don’t do much, it can ruin the parts.) I use the mid power rebound spring and reduced power mainspring from the Wolff kit
https://www.gunsprings.com/SMITH+&+WESSON/K,+L,+&+N+FRAME/cID3/mID58/dID264
With lots of dry fire, the trigger pull is just at 8lbs DA and about 2.25 lbs SA.
So far the gun has been reliable, but I reload my .38’s with Federal primers that seem to be pretty easy to light off. Harder primers may or may not work as well with a reduced power mainspring so be sure it is reliable with a hundred rounds or so if you swap.
The steps to open up, polish and respiring these guns can be found on you tube, the Brownells series of steps is a great one to use.
Good luck, and stay safe.