a 1/4" TB is what you want if you feel that you need to rplace the present system, but I'd like to comment. The 15 sails best (and fastest) with enough slack in the rig to not have to adjust it to set up the mast, once you have it tuned like you want it. jerry ----- Original Message ----- From: "stevetrapp" <stevetrapp@q.com> To: "For and about Montgomery Sailboats" <montgomery_boats@mailman.xmission.com> Sent: Friday, June 28, 2013 2:01 PM Subject: Re: M_Boats: M-15 tunrbuckle? I want to replace the clip-on device that secures the foreshroud of my 1985 M-15 to the bow of the boat with a turnbuckle, which would be easier to adjust. I found Johnson turnbuckes at West Marine and other local boat hardware shops that are available in 3/16 or 1/4 and bigger sizes, but the 3/16 looks too small, and the 1/4 looks too big. Any suggestions of where I could find a stainless steel turnbucke in the Puget Sound area that is not too small and not too big ? Steve M-15 # 335 -- I am using the free version of SPAMfighter. SPAMfighter has removed 8891 of my spam emails to date. Get the free SPAMfighter here: http://www.spamfighter.com/len Do you have a slow PC? Try a Free scan http://www.spamfighter.com/SLOW-PCfighter?cid=sigen