What he said. The hawse fairlead must be constantly inspected for nicks, and sanded off accordingly. I used a foam sanding block from Wally world.
I didn't want to replace the synthetic every two years so Im leaving this one cable.
I honestly don't know why you can't use a roller lead, and many a person I have seen still had it with synthetic rope.
Roller can be used as long as it is new or if the rollers are sanded very smooth. Any burrs on them will damage the rope. Rope is nice to handle and they sound really cool when they snap. They don't take your head off like cable can. I might go to heavy duty rope when my cable gets a little more worn.