Gori 2-blade prop

My Martec was tired and I knew I wanted a folding prop to replace it.   Pretty happy with the Gori.  Do beware that the normal shaft section where the castle nut is installed may be different in length than a typical North American prop.  (the gears foul the end of the shaft on the gori, there is more space on the martec.   A long story but it took some doing to install this, and some mods to a brand new shaft.
In any case it works great, no issues so far.   Shipped air from Denmark amazingly quickly, great service from the agent in New England somewhere.

What are these used for?

Documenting my rig for winter work and a new mainsail, and it's like a box of chocolates...

Here is the gooseneck fitting from below - what are the two fairleads for? (Cunningham maybe?)

Another mystery item, this shot from the bottom of the boom.   The swivel padeye is the vang attachment.  What was the the cleat mounted forward of that used for?
Does anyone know who manufactured the padeye itself?

The next two show why it is a good idea to inspect the rig!  End of boom casting fracture, and mainsheet attachment rivet failure.