Tom, The 8:1 would be fine, I believe you could use dyneema or similar line for the cascade line instead of wire.If you change to line here use a bullet block at the lower "A" block. The set-up on my own boat is a wire over a block at the end of the backstay attached to the block and tackle on the starboard side of transom attached to the chainplate. Works fine - the type shown on Harken page would be 'faster acting' and does not rely upon the running line for the backstay itself. The cleat and line matter nought per side of the boat as they are acting on lower "A" block - straight down. GO Photo of the version I have used for 12+ years attached. from MSOG - photo credit Sean Mulligan. Harken info from their site: 8:1 Split Backstay A more powerful version of the split backstay adjuster uses a doubling wire running through a wire block for a purchase of 8:1. Diagram Ref. Description Small Boat Part No. Midrange Part No. Big Boat Part No. A Single _304_ (http://www.harken.com/productdetail.aspx?sku=304) _308_ (http://www.harken.com/productdetail.aspx?sku=308) B Fiddle _2655_ (http://www.harken.com/productdetail.aspx?sku=2655) _2621_ (http://www.harken.com/productdetail.aspx?sku=2621) _2621_ (http://www.harken.com/productdetail.aspx?sku=2621) _1559_ (http://www.harken.com/productdetail.aspx?sku=1559) C Fiddle _2658_ (http://www.harken.com/productdetail.aspx?sku=2658) _2624_ (http://www.harken.com/productdetail.aspx?sku=2624) _2624_ (http://www.harken.com/productdetail.aspx?sku=2624) _1556_ (http://www.harken.com/productdetail.aspx?sku=1556) In a message dated 9/11/2013 1:04:37 A.M. US Mountain Standard Time, thomaspbuzzi@gmail.com writes: http://www.harken.com/content.aspx?id=3896