There has been some modifications to TriFoilers since #21. Most note worthy are 2 changes, first, mast rotator bars for the mast have a hinge point to make assembly faster and reduce holes in the ama IF the mast falls down. At the same time, we included a 2:1 purchase on the control line. Second, the sensor retraction line got a 2:1 purchase so it is easier to pull up. Many improvement to rigging ease and safety were made. For a good explanation, read this page on the wiki site. http://www.trifoiler.info/media/index.p ... at_Current
All the boats are the same for stability and speed.
We don't make the sails anymore, you will have to have a sail loft custom build a pair.
I have been rebuilding a boat #62, I have replaced almost all the lines, wires and bungee. Bungee is also known as shock cord. A rubber rope that pulls together when stretched.
I hope this helps, good luck.
Dan, TriFoiler Guy