They are great guns! I can't speak to gunsmith experience because I never needed one. I had 2 557s, a 20 and 12. The 20 had the non-select single trigger and I liked it, I now have a 28 GA 578 with options and it is outstanding. Fit, finish quality of engraving and wood, all outstanding. I have a number of AYA #2s and 4/53s they are good but don't compare to the Arrieta.
Bob Jurewicz