Interesting that Rudder Craft didn't stay with the original design. Seems the simplest and strongest way being attached directly to the steel core. I was thinking a piece of stainless round stock that fits in the large hole in the side, drilled and threaded for an eyelet that could be screwed in from intersecting hole in the back. I appreciate both of your responses and the pics, sure does look like a lot of work to fit it to the hull. I will let you know what rudder craft tells us, Thank you both.
My centerboard didn’t have any steel in it or any holes. I had to drill everything myself.
I thought about doing something like you describe at first but I finally decided on using the hole with a loop of dyneema for the following reasons:
-this centerboard is a lot lighter and it doesn’t need such a strong connection as the original to raise it.
-a steel insert still requires a hole thru the centerboard but with dyneema rope that hole can be made smaller, thus stronger.
-I generally don’t like metal imbedded in (or glued to)
composite
-ruddercraft suggested it
I did make sure to locate the hole were there was enough “meat”. Can also reinforce each side of the board with G10 before drilling the hole for even more strength
PS, your sketch looks pretty good to me!