Preventer Rig on a Vagabond 47

[sailawaybb]

In Vava'u Tonga prepping the Vagabond 47 to sail to Samoa, Cooks, French Polynesia, Hawaii.

I have a rigging question:

The the captain wants to create a point for a preventer on both sides by
taking out the 5/8" pin that connects with bottom of the turnbuckle to
the chainplate and put in a SS 1/2" shackle with that pin where the
5/8" was. The eye of the shackle extends out with another smaller
shackle on it and a block attached to that that will go to another
block on the main boom. There are a total of 6 shrouds on each side
. . . The captain says the shackles were expensive and believes they
are US made. I will take some photos and send. I hate to mess
with rigging points like this and would much rather put a large U-Bolt
thru the bases of both turnbuckles that share one of the 3 chainplates
. . . . or . . .I don't know . . . .

Please let me know your thoughts . . .

Thanks,

B r u c e