Thank you all contributors.
1. Are turnbuckles necessary over 40 feet vessel? We know who has stated this but a lot depends on the vessel and how hard it’s sailed. We have seen
rigging so tight you question if the
mast can take it. Seen a few masts bent by over pumping the back stay. It might take more time to tune the rig. Where is the data. We are not a performance
boat. Manatee move so slowly you can’t tell which direction they are moving.

2. Chamfering. We have a lot of material so I agree, this is not going to weaken the chainplate significantly. The plates are 3/4 x 2 and there is 1-1/2” of material from the center of the hole to the top of the plate.
I like the idea of dumping the jaw/ jaw thimbles which are not
cheap. Again, it’s the scratch or crack
inspection issue. Even if we need to stay with turnbuckles.
3. Delrin deadeyes. I remember there was a post on plastics as an alternative to
aluminum. Lots of plastics to choose from so I need to do more
research on this.
I like this idea as well as going directly to the chainplate.
4. Dog bone shaft into chainplate. We could try this easily. The chainplates are not drilled to 3/4” yet so we can get a nice tight fit by knurling the bar just where it fits into the plate. Adding washers to the ends is easy. You can make them any length. So here is my first question. If we go 7/16
dyneema to a dead eye or some other thimble... do we use this bar on the chainplate for the lashings or do we use a pre made loop or some Wichard soft shackle. There are a lot of combinations using fitting we’ve never seen before.
What interests me about the dog bone chainplate is the large diameter (3/4”) and the nice smooth surface we could get with stainless.
Poking the
dyneema right through the chamfered chainplate will
work but it’s a harder bend than loops over the dog bone.
Comments? Ideas? Thanks in advance for all replies.

Mark and his ever hungry crew.