Dave,
I have a 1986 Daysailer 3, hull # 13222. The best site for explaining the differences is on the Day Sailer Assn site,
http://forum.daysailer.org and look at "Newbies" link for "how to buy" link. Has photo's and all. They also have a list of fleets.
The "Daysailer II only" discussion goup (here) has a thread that has a good example of centerboard rigging that applies to DS3's also. Search for "Paul Diglio".
My CB is a bit hard to get out, the first couple of inches, then frees up nicely. It drops very well. I saw that ds2's and ds1's have some problems keeping board down. Mine seems to be weighted. Maybe that's one of the fixes for the DS3's that makes them NOT meet Class rules. My question is, Is there an established handicap for racing DS3's???
My boom crutch is two slats of oak that are connected at one end and scissor open to hold the boom. The are approx 2" x 1/2" slats. Don't have the lenght off hand. The lenght is long enough to keep boom level. You could probably get away with using two old broom/mop handles. The lenght is approx the same and most people throw away their old mops anyway.
I looked at topping lift but couldn't see a attachment point on mast. Boom crutch folds small enough that it's not needed.
I have gotten parts from Westmarine. check
http://www.westmarine.com and request a catalog. Also, this web here has a parts link.
Tom Mack
Emmaus, Pa.
Tom Mack (tommack-at-fast.net)