One thing that makes a dispro difficult to restore is that the hull has to fit the device.  Since the device is cast iron it doesn't move  , and if the hull doesn't fit the device it's likely that the garboards will split when the bolts are tightened into the device . I made a plywood template to match the bottom of the device casting . While I was making it , it was interesting to note that both sides of the casting aren't the same . The pattern is temporarily screwed to the keel while the planks are fitted.

Where the stem and stern post meet the keel , a small wooden dowel called a stop-water is fitted . The idea is that if water tries to creep up the joint , it will cause the dowel to swell up and stop the leak .

The Garboard planks ( the ones beside the keel ) have quite a bit of twist in the ends , so they are steamed and twisted to shape at the ends . After the planks cool they will be nailed in place .