Maybe it’s hit or miss but I bought several (6 in 12 years) Stern nib pins and they’ve been fine quality. XMLE needed a new Aux board. Other than that great quality. Too soon to call SW premium but so far 2 months it’s been great not a single issue. I was staying away from Spike pins I’m a bit scared of node boards but not scared enough to pass up SW.
As for too many pins by Stern that’s not a concern for me I’ll buy one every 2-3 years so I can pick and choose the few I like. They don’t all need to be home runs.