Hi Brian,

My C&C34 bow fitting replacement is shown in photos here:
https://photos.app.goo.gl/Sd5YJg8rJ5GwGZ8M7
I got the general concept from the Johanna Rose blog
http://svjohannarose.blogspot.com/2018/06/stemhead-replacement.html but
wanted to keep it lighter (using aluminum rather than stainless steel) and
needed to design around the different features of the C&C34 bow.
It is designed to use a Mantis roller and I extended the bow a little to
provide a tack point for the asymmetrical spin.  I created the design
myself in Onshape
https://cad.onshape.com/documents/87319ac0373461e07d9c3465/w/8092d805cb5db461fce8cc09/e/94229b4df81f5f30af53d096
using measurements and a wood moc up and then had Xometry build it for me
including welding and heavy duty black anodizing.  It didn't fit perfectly
and I had to add a stainless steel spacer in front of it so some small
adjustments to the design might be a good idea if you are going to have
another one fabricated.

Since I designed the bottom to be flat for easier fabrication, I had to
fill the deck with thickened epoxy to create a flat mounting surface.  I
was concerned about the added bending moments from the anchor so I extended
it back about 8 inches compared to the original and cut the toe rails
accordingly.  That also gave me room to move the chalks back behind the
forward pulpit legs. I also added an additional 1/4" G10 backing plate
bonded under the existing plywood backing plate underneath it. Fabrication
was ~$2800 and then the stainless steel chalks (Schaefer XCL Model 60-50) and
roller assembly it was closer to a $3500 upgrade all told.  Probably not
the most economical approach in the end and definitely a lot of work
although I do like how it came out.

I did this as part of a full deck repair/repaint/refit project in spring of
2000.

Having an anchor all the way out on the bow does weigh the bow down a bit -
I ended up moving my spare anchor out into the aft lazarette to
compensate.  Having the roller definitely makes launching and retrieving
the anchor a lot easier!

Let me know if you have any questions.

Nathan

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