[oldpotatoe]

From Campagnolo NA...with 10s chains, supplied pin needed to be installed into ‘virgin’ outer plates. No pushing pin out and then new pin in=broken chain there a high probability.
NOW with ‘peened pin’ 11s and 12s Campagnolo chains. When installed chain removed for cleaning...split 180 degrees from original pin, clean and then install with new pin, peened even tho not ‘virgin’ outer plates. MUST be new pin and peened with an appropriate tool. Still think a master/quick link is more better but...new 11s or 12s peened pin ok.

For info.