You might want to take a look at the new high-tech lines instead of wire for this kind of application. It does not kink, it's lighter and stronger, it turns a sharper radius, you can tie knots in it, it stretches a very slight amount more than wire but not noticablely and it costs about the same. Check out most any sailing catalog and look for brand names like Vectran, Technora, Dyneema and Spectron.
www.westmarine.com and
www.layline.com are a couple I use.
John Sayles, PE