You might have done this already but just in case..... I'd have thought
going to sailing clubs with a sunfish fleet would give you a lot of
hands-on enthusiastic help and info and you'll see lots of sunfish for
comparing with. I did a quick google search for clubs sailing sunfish
and think you should be able to find one in your country. Also as far
as Groups goes, consider uk.rec.sailing, alt.sailing.asa,
rec.boats.cruising, rec.boats.racing too, I think some people even not
currently owning one sometimes were familiar with it in the past.
Enjoy
Solo Thesailor
http://sailingstoriesandtips.blogspot.com