The original design included plans for having various fittings cast. I decided that I would take advantage of being overseas to have them fabricated in stainless steel (316). Below is a shot of the ones produced to date, across the top you have six chainplates with backing plates to match. Underneath on the left is the stem fitting and then three whisker stay plates (I didn't take a close up of those, they are 6mm.
The chainplates (one close up below) are all 8mm, you can see the triangular shaped gusset underneath to support the right angle step out then up. This space is where the gunwale hardwood sits (two holes for attachment) and the very top hole is where the rigging attaches, note the slight bend inwards about 4cm up. Five bolt holes to go through the bottom of the fitting and a hardwood pad into the hull, then a shaped backing hardwood piece on the inside of hull to spread the load and the stainless backing plate last. The hardwood pieces will need to match the curves of the hull to give flat surfaces for both the chainplate and backing plate to sit on.
Below shows the inside face which will be on the inside of the stem under the bowsprit in the anchor well, where there is a small lower deck section in front of frame one.
Below is from the side showing the 8mm upright piece that goes through a slot cut in the bowsprit. Note the holes for attaching rigging at the top edge. Note also the slope to match the one already cut on top of the stem according to the plans.
More fittings underway for the rudder, I'll post pictures when I get them. Looking forward to getting back underway soon!