It's best to buy a new mainsheet system that is completely pre-assembled and ready to rig. We only use quality sheets from Gleistein and Liros as well as blocks from well-known manufacturers. Everything is perfectly coordinated, so it is certain that ratchet block and corresponding tackle will reduce pull on the mainsheet. The line is already reeved into the mainsheet block with cleat. All you have to do is affix to the boom and base in the cockpit. By doing so, you can replace the entire mainsheet system in just a few minutes. Never have problems with your mainsheet tackle again!