Sent my Rimfire Super to Yonkers 7/20; they received it 7/23. It arrived today, and here is what they said they performed:
Firing pin stop;
Trigger group adjusted (I have no idea what that is);
Chamber reamed and polished;
Recoil spring replaced.
Test fired with 4 mags of CCI mini-mag 22LR RN.
The issue for repair was this: after 610 rds. total, the weapon would not feed/extract reliably CCI Stinger (~$6.50/box of 50). Does not like Fed. Champion, Automatch. Would like to use the weapon for Bullseye (Precision) pistol, but not at that velocity. Noticed they did NOT replace the mainspring.
As soon as I can, I will try the weapon on different loadings and report back.
Gotta say, I am thrilled with the turnaround time on the repair.
Maybe it's because it's a .22.