I've owned both JJP & Stern pins. They have pretty much all required varying degrees of tweaks & fixes.
I think it's par for the course to expect some adjustments on NIB pins from all of the manufacturers.
That's not to say that defects (ie: in the pf, cabinet, etc) should be acceptable. This is when a reliable distributor should hopefully step up to the plate to help find an acceptable solution with the manufacturer.
Regardless, I have found that Frank at JJP & Chas at Stern to be very helpful over the years.