Are Tartan 37's that rare that one would have to opt for a owner modified one? Or is it that the price is really attractive?
It seems to me that there are a glut of used sailboats on the market. I for one would opt for a boat that was well maintained in it's originally designed configuration.
If someone glassed over the centerboard because they didn't want to maintain it or because they didn't maintain it, that would signal a red flag for me.