Yes I run a 15 on my Optimum no problem, but it has soft stop and speed control. The Canon tech near where I live told me not to run more then 10 pounds on the Mag 5 or I risk snapping the cable. Says it’s not rare. The weight goes down pretty fast and comes to a sudden stop… snaps the cable. Scotty snubers are rated for 10 pounds, if you buy the heavy duty ones for larger weights they are far less elastic. Could clutch it down, but then your getting up too often if your trying to hug the bottom, and if you read the manual it doesn’t suggest you need to clutch it down to avoid snapping the cable when you stop. So in reality this rigger is not suitable for anything more then an 8-10 pound ball. And we haven’t even discussed the ware and tear on the boat gunnels.