Because these posts are also read by others, besides the originator, who are also now or later considering the same projects, I thought I'd include a message I sent back to Tug after he asked me, in a Private Mesage, which bow roller I would recommend, just so others could consider the ideas contained therein:
Tug- I can't really tell you which one to use without having them in front of me and being able to match them to your boat and anchor at the same time. You want the bow roller long enough to keep the anchor head far enough away from the boat as to not bang the bow when going up and down. If it's too short, it will chip up the bow as it swings. More importantly, you want the anchor balance in the roller to be such that when you release the tension on the rode (which includes the weight of the chain trying to hold down the anchor shank, that the weight of the anchor head causes the anchor to self-launch.
To get all this right, you have to be able to place the roller on he bow, the anchor in it with the chain attached, and see if the balance point is far enough forward to make the anchor self launch, and there's no way to try it out without all the parts. That's why it's sometimes smart just to copy someone's combination that we know already works. Maybe you can take your boat and anchor with the chain to a marine dealer and try out the various rollers in the parking lot? That's what I would do! Let me know if this helps! Joe.