What I needed was Stihl 26 RS 74. Brilliantly bought a pair of chains that are 26 RS 72. Just realized the mistake when they were delivered today. Yep, those 2 links actually make a lot of difference. No way these chains will fit on my MS261. So, what are my options here, other than returning them to the seller? Can I buy a couple more links and put them on the chain? If so, where would I buy links from?