Jake, I know you've had/have one, but on my Infusion those tangs are angled and firmly set in the hull- but I'll keep that in mind.
Just keep in mind that there have been reported failures of that through hull pin because of the way they are oriented out of column. The ones you pictured are that way. Mine are angled in the hull as well but the alignment of that pin isn't quite right with the mast rigging (which would be almost impossible to get right when building the hulls and I bet there is a good bit of variability in how those are installed). It puts a lot of bending stress on that pin where it comes through the hull if the chain plate pivot doesn't pivot toward the mast. I would consider at least removing the plastic spacer periodically to inspect for any fatigue cracks on that pin.
Advised by you- I'll do just that.
Agreed that it should be oriented so that the pins are perpendicular to the line of the pin and mast, so it can pivot towards the mast with less stress.
:-), HOwever, if you rake the mast back far enough, it'll take care of that. ;-)