When I had a Hood
810 Continuous Line furler, the continuous loop ran through double fairlead blocks connected to, and inside, the toe rail. This double line ran back to a horn cleat I mounted on the cockpit coaming next to the helm, for ease of use. As others have indicated, Hood sold this unit as a furler not a reefer. HOwever You can reef with this system by securely tying off the double line to a cleat, but a lot will depend on the quality of the line itself as it will get slippery with age and the teeth on the drum may not hold it in the reefed position. When I had this system, I found it to be a bullet-proof furler, but replacing the furling line requires mastering the "Constant Diameter" splice. No fun or easy. I used a home grown workaround that sufficed. Let me know if interested.