Hi Emily, Two suggestions…
Here’s a C&C resource:http://www.cncphotoalbum.com. It looks like they have a database of 38 MK3 owners (after opening up the owners database you have to scroll all the way down to see the MK3’s). Perhaps there is some information or someone you can reach out to from there?
Also, this site has two advertisers whose business is rudders. Either one may have a template or at least knowledge of the rudder/keel relationship.
Hope this helps.
