attn rock 54
Hi rock! As to your Gunsmoke (or Wyatt) being not as smooth as your 686: I own 2 Wyatts. After putting a couple of boxes of service ammo through each one, the innards settled in place (exaggeration, I know) and now they are very smooth. Please remember all Js use a coil mainspring and I've heard they cannot be made as smooth as the leaf spring in a larger framed gun. Some will disagree below...
A little difficult getting accustomed to the lighter rebound (trigger return) spring. I was going to change it out in my 2 guns, but I left the spring in after my gunsmith told me the PC designed it that way. Absolutely no problems. The Wyatts are addictive little chicken pluckers: shoot it and love it.
Cannot comment on 'cylinder rings.' Hope the above helps.