Re: Fender hangers...too many choices!
Without disagreeing with anything that had already been said, and all of it is sound advice, I still want to point out that the worst case is trapping the fender under the dock. The forces are greatest then, obviously. And yet, the stanchion anchorage hardly seems to be such a great issue then. Or, rather, the much greater problem is the lack of fender-age when that happens.
At the same time, the bit of give in the lifeline is arguably preferable to the solid metal to metal attachment of clipping to the stanchion base. I only meant to say earlier that it isn't as dire as all that. You're simply trading one set of problems for the other, and I don't see that one is clearly preferable. Pick one, keeping in mind that a tidal range of 3 ft or so is going to be trouble anyway.