My "local" smith, in New York, installed a front sight for me, that blew off the gun
on the first stage of a match 250 miles from home
He also told me that many modifications that I subsequently had done, were
not possible.
Really depends on how good Your Local smith is - BTW, I also had problems with
a known smith who was 100 miles from home.
Here in Florida, there are a few smiths I've have success with, nearby (at my
local clubs).
Just depends on how lucky you get