In the olden days we'd cross drill the mainspring tension screw hole and tap it for an allen head setscrew. We'd also recut the threads for the tension screw itself to be neat and thorough about it. Then it was a simple matter to tune the mainspring tension to be reliable and as light as was practical. This was preferable to us when compared to loctite in case we wanted to experiment a bit more. Other options include Wolff reduced power mainsprings: https://www.gunsprings.com/SMITH+&+W...3/mID58/dID264 and I personally have had good luck with rebound springs in the 13-14 lb range. I normally buy rebound spring assortment packs and start at the low end and try each one in normal dry-fire until I get the lightest spring that gives me the trigger return feel that I want. It usually takes 2-3 tries to get exactly what I want. I tend to buy individual springs direct from Wolff instead of others manufacturers "kits", not counting the Wolff rebound spring assortment mentioned earlier of course.
For grips, have you considered G-10 micarta? VZ has some really decent looking designs. My 686 wears Hogue wood grips, which fit my hand better than their rubber grips do, but mine is a square butt, so there's a significant difference there. For rubber grips I prefer Pachmayr Compacs or Compac Professionals. I tried to look them up, but Lymans website is poorly done and their Pachmayr cataloging is horribly challenging.
“Detached Reflection Cannot Be Demanded in the Presence of an Uplifted Knife” ~ Brown v. United States (1921)
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