IMHO, it is a really bad idea. A mainsheet can get fairly highly loaded....but you are talking a pretty small boat here... What would probably be better is to make a saddle that fits over the centerboard trunk and through bolt it through then entire trunk. Another option would be to make a board that has T-nuts embedded in the bottom, and glass it to the top of the centerboard trunk. That way, the mainsheet block would be bolted to the piece that was glassed in via the t-nuts, shown below.
I have been thinking about this option and have a couple of questions:
- I am assuming I would have to remove the gelcoat before I could glass the board into the trunk, what would be the best way to remove the gelcoat?
- How far down the trunk should I glass?
- When finished should I apply gelcoat or just sand and paint it? I worry about how a hand applied gelcoat would look