. Also I believe the wedges are there just to keep the mast in the correct place until the stays are attached and tensioned. I think you can remove them.
I tend to agree with you on that even though if I was going around cape horn I would probably go with the epoxy. I've used a whole tube of the best GE caulking that I could find reasoning that when it hardens it should provide extra support even though I doubt the real need for that support once the shrouds gets tensioned. Even with that caulking in there and a mast boot I recently had some leakage with this recent rain on the east coast.