71Irwine32 - Dude,
I am going to go out on a limb and suggest that your
rig has been Gerry-rigged long before you got to it. Before that connection broke on your end boom fitting your boom was held up by a 'topping lift' which was originally connected to the broken fitting and then transferred to the out haul fitting or 'becket' (a loop for connecting other
rigging to it). The 'becket' or loop that your 'topping lift' is now connected to (the
line that holds up the boom) most likely had a block connected to it as part of the 'out haul' mechanism which helps to stretch the main sail back along the boom and is used to 'flatten' the sail.
If you look closely at the last pic I posted you can see that the main sheet on my boat connects to one of the connection points and you can't see that our 'topping lift' (that lifts the boom up and has the Dutchmen
lines connected to it) is actually connected to the other other (top) connection point on the rotating piece on the end of our boom.
I have the same abrasion issues with this piece as you do only mine is older and not broken (yet). We have repaired this piece of hardware twice so far and it keeps on wearing each season.
Wish I had your weather as it is cold in NYC. 30 degrees would be warmer then what we've got.
Enjoy.