What Dyson said, wood block or magazines as a base to tap pins in. The least expensive pin tools work great. I have been changing links on my Omega for 15 years and I am on my second plastic pin tool. A small bronze hammer for tapping pins into place work best.
Omega 1/2 links give you 1/8" in length, full links are 1/4" it is difficult for me to imagine one link being too much and a half link being too little.
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