Simpson-Lawrence KBR-20,
A few years back, I installed a Simpson-Lawrence KBR-20 anchor roller on the bow of my 1980 Hunter 30. I angled the roller to the left of the stem fitting and had to cut off the jib reefing hook on that side. I also had to move the chock slightly aft on that side as well. I used an aluminum backing plate held against the ceiling of the anchor locker and bolted the roller to it but with lots of caulking in and around the bolts. I attached a strong bungee cord to the eye strap in the locker and use it with a snap hook to keep the anchor in the roller (except in rough weather).