Summary

I modified Skyblue's Sailboat hull because I was having a problem printing it on my Afinia. The rudder and keel ridge were printing separately from the hull. I investigated by opening the file in Meshlab and discovered that the rudder, hull, and keel ridge were in fact separate meshes. I wrote to Skyblue and he said he got the hull from another Thingiverse guy but couldn't remember where. We haven't been able to find him to ask about the hull. I'm guessing he forgot to combine the three elements into one mesh before extracting it to an .stl. I've only included my version of the hull in the files section, the rest you can get from Skyblue.