It all depends how vertical the drops are. If there's some movement front to back, a half link may be right for you. You'll be lucky to get spot-on chain tension with a half link that lasts forever.
From what I've heard half links are notorious for bending out of shape, stretching, or snagging on gear teeth.
Try it though, it's a very cheap option if you can't find a magic gear with what you've got.
Take a look at http://eehouse.org/fixin/formfmu.php for working out if a half-link will get you the right gear. Also other pages there about chain stretch etc.
It all depends how vertical the drops are. If there's some movement front to back, a half link may be right for you. You'll be lucky to get spot-on chain tension with a half link that lasts forever.
From what I've heard half links are notorious for bending out of shape, stretching, or snagging on gear teeth.
Try it though, it's a very cheap option if you can't find a magic gear with what you've got.
Take a look at http://eehouse.org/fixin/formfmu.php for working out if a half-link will get you the right gear. Also other pages there about chain stretch etc.