Tension Gauge for 1/2" wire

[Dennis1]

Brion - I sent you a PM with a link to pics on the original owner's site, which I'm careful not to post publicly in order to make sure I don't overwhelm his site.

For everyone else, my sailboat is a 50' sloop-rigged Columbia 50, which I believe is the last sailboat designed by Bill Tripp just before he died. As I indicated to Brion, please feel free to correct me if my research has misled me there. I'm trying to get a good dock tune and appreciate any help in finding a good tool for 1/2" wire line. I appreciate all the feedback from folks already and welcome any comments, thoughts or general observations ...