Why not call the Pietta repair center here in the U.S. and ask to talk with a gunsmith.
I have an Uberrti that I could not get the cylinder back into the gun. I called the gunsmith at the repair center, he said he knew exactly what the problem was. He also said the pall springs on the pistols lately were to stiff and he would take care of that issue.
I told him I was going to use the pistol in competition and he said he would "check" the trigger, the trigger is very nice now.
I asked him how long it would take to repair the pistol, he said the day it arrives he would make the repairs and it would ship back that day.
Shipped on Wednesday and received the following Wednesday.
I would call the Pietta gunsmith and skip returning it to Cabelas.
RDE