We have a block & tackle setup on our J/36. I believe the photo shows the tackle is 4:1. It's the angle of the split backstays that provides the power you need to torque the mast. We get ours to bend to a chord depth of about 10 to 12 inches with this setup. It's quick & easy. The lower fiddle block & cam have a quick-release shackle so that at anchor we can move the tackle and have clear access to the swim ladder.