I have not seen any pictures of a Core Sound with multi colored sails so I thought I should post one.
I started CS 20 # 36 in December 2002. I am not sure when she will be finished but we have had her in the water about 5 times. She floats. Floating is a good thing for a boat, I figure. She sails good.
# 36 went together quite well. She is evidence that a person with mediocre skills can build a Core Sound. I used okoume for the 1/4" panels and marine doug fir for the 3/8" panels. The plywood was purchased form Edensaw, Seattle WA over the phone. Edensaw prices were good and I would have had to pay shipping no matter who I ordered the plywood from. I picked the plywood up at he truck yard in Denver CO. I was careful to make sure that my minivan would handle 4x8 sheets. Of course, the okoume was 48.5x 98.5 or something like that. A tight squeeze. The rest of the structural wood is Home Depot doug fir. I ripped 2 by lumber for the 1x2's. There is 3.8oz glass on the bottom and sides to the sheer for abrasion resistance. I put a few coats of clear gloss Spar Urethane for UV protection. Perhaps someday I will fair and paint. Probably not.
My centerboard was binding so I made it thinner. Now it does not bind but rattles a bit. I will be more careful on my next boat
The sails are from B&B. Standard sails with sleeves. I am very pleased with the sails. The masts are 8' sections of .065 aluminum tube. Shipping was much cheaper going with 8' sections, rather than 12' and 6' sections. In addition to sails for propulsion , I have 9' spoon blade spruce oars. I plan to add additional oar locks and a removable seat for rowing. My wife needs a more convenient place to sit and row.