HereĀ are some pdfs of the plans courtesy of the Duck Punters of West Mersea.
https://s3-eu-west-1.amazonaws.com/keepturningleft/WestMerseaDuckPuntSheet1.pdf
https://s3-eu-west-1.amazonaws.com/keepturningleft/WestMerseaDuckPuntSheet2.pdf
.
https://s3-eu-west-1.amazonaws.com/keepturningleft/WestMerseaDuckPuntSheet3.pdf
.
https://s3-eu-west-1.amazonaws.com/keepturningleft/WestMerseaDuckPuntSheet4.pdf
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https://s3-eu-west-1.amazonaws.com/keepturningleft/WestMerseaDuckPuntSheet5.pdf