Thanks. There already is a master link in (probably forgot that in the count). When I first got this bike last year (from my brother), it had a Shimano Crane RD on it, with wheel all the way back (no adjusters). The chain was slack in the small-small combo. I switched to a Suntour Cyclone Mk II GT when I was riding it last year, and it would take up the slack in sm-sm (not that I use that gear). I am switching to a standard cage Cyclone Mk. II, and since I tore the bike down to the bare frameset to framesaver it, I am going thru everything while I build it up, hence the question. I haven't actually put the chain on yet to see about slack with the current setup, but I guess I will before I do anything about length.