I just got the gun back. Instead of replacing the front sight with a shorter one, as requested, they put a taller rear sight on it (but didn't mention that work in the notes). The rear sight they replaced was the .160 height, I didn't even know they had a rear sight taller than that! (Attached a pic of the new taller rear sighr next to a standard .160 height sight on another 686 I have).
I don't know if they discarded my note, but I said I wanted the shorter front sight from the 6" on it. The notes on the repair sheet just said "gun shooting a few inches off". I would rather have a shorter front sight than taller front and rear sights (lower profile).
Barrel cylinder gap. From the left (cylinder release side) it is gauging around ~ .0035 to .004. From the right side it is gauging between .045 and .006 (depending on what chamber it is for each). Larger but not a huge difference, I'll chrony it when I get to the range and see if there are any velocity differences.
Trigger wise, they removed and returned 2 springs. Double action pull isn't as light as the ~8lbs before but is actually pretty decent for a factory trigger. Aound 11lbs and very smooth, stages very nicely (I think the prior owner must have had trigger work done to it more than just the springs. Likely polished, etc. as the DA pull is still much nicer than my other 686s). Pull weight is around 3.75lbs single action (was at or just under 3lbs prior).
I plan to shoot it tomorrow to test POI and velocity.
Range report hopefully tomorrow.