bgreene,
http://www.classicseacraft.com/commu...ad.php?t=23767
The link above is to a thread I started asking the same question for my 1978 23' Sceptre I/O (pictures of it were posted by Trayder in the gallery section under "Chris Downey's
23" for reference). There is a wealth of information in that thread (I originally posted it on 3/25/12 in case the link does not work), especially from "bigeasy1" who has me convinced to have it done from the inside. Good luck and feel free to ask more questions.