Originally Posted by PepsiManKolt
I'm not sure which sharp edge or binding points your refering to? If the line is set properly then it shouldn't hit and "sharp edges" or "bind" in any locations. I'd trust a roller any day over a CNC machined peice of metal. You don't think friction will chew up your line just as easy? Just give it some time and use.
Sharp edges are top and bottom. Pinch points are between the rollers. I know you'll disagree about running synthetic rope across oxidized rollers but that's another source of abrasion.
When you're pulling, you will ideally pull so these things aren't a problem but extreme angles are not uncommon and a piece of CNC machined metal is a lot better protection against abrasion than a set of rollers for synthetic rope.
Synthetic rope is pretty tough stuff but abrasion is its worst enemy. You might want to read up on synthetic rope and see what the manufacturer suggests you use. Do you absolutely need to use a Hawse style fairlead? No. But doing so helps prevent abrasion.