This might work on an M17, but the M15 is designed to have a slightly loose rig... using a tensioner like this will prevent the center of effort from raking the mast aft upwind automatically as it should, and could damage the cabin top. I re-rigged my M15 using 316 wire and Hayn Hi-Mod fittings, which can be done at home with just a crescent wrench, and allows me to re-rig every few years by just buying new wire. For stay adjusters, I used 10 hole Hobie Cat shroud adjusters like this: https://westcoastsailing.net/hobie-shroud-adjuster-10-hole/ My Spyderco Salt (a gift from Sal and Gail- Thanks!!) slides right into the shroud adjuster, and makes a great handle for adding a small amount of tension when putting the pin in... no need for a leveraged adjuster. Sincerely, Tyler ----- Original Message ----- From: "Alex Conley" <conley.alex@gmail.com> To: "For and about Montgomery Sailboats" <montgomery_boats@mailman.xmission.com> Sent: Sunday, October 11, 2020 9:38:22 AM Subject: M_Boats: Forestay Adjusting levers? Alright Dave, here’s a question related to one of my winter projects. I’ll be replacing the stays (friend’s story of loosing mast first day of a San Juan cruise convinced me new wire and the peace of mind it would bring are worth it). I’ve contemplated adding a adjusting lever to the forestay to make setting up and tensioning the rig even easier. Curious if the M boat hive mind has any opinions on a) whether a forestay lever is a good addition on an m15, and b) if there is a specific one folks would recommend. Here are the two that have caught my eye: https://www.duckworks.com/product-p/sj-14-205.htm Or https://www.westmarine.com/buy/c-sherman-johnson--small-7-hole-quick-release... (more holes but working load of only 500 lbs) Thanks for any feedback! Alex