Hi - having a go at MTB Bloodhound - I am using the Marine Modelling International free plan from April 2009 as the basis and then using more information from John Lambert's book 'Coastal Forces' and also MP Cocker book 'Coastal Forces vessels of the Royal Navy 1865' .
Slight deviation from the instructions in the magazine; they use balsa wood for the framework and thin plywood for the skin; I have reverted to 4mm lite ply for the frames and diagonal Obechi planking, covered with an exterior mahogany planking - that is the plan anyway

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John