This is the yacht built by my grandfather in Tasmania in the 70's. It's a WARATAH TWIN BILGE KEEL MASTHEAD SLOOP. Designed by Dennis knight @ 21ft. My mum passed the plans down to me but I had a dog many years ago and it chewed up some of the sheets. I would like fresh copies of sheet's no: 2, 4, 5. Also i'm keen to find the yacht pictured above, then named ORION 3 @23ft in length. Sold in Tasmania in the late 70's and sailed to King Island, Bass strait. If you can help in my search please drop me a message.