It might be a good idea to talk a bit about the overall design of this plane.
It is loosely based on an example by Griffiths of Norwich, and has the unusual
feature of an adjustable parallel mouth closer fixed in place with a bolt.
Normally the closer is wedge shaped to hold it in place.
Apart from the angles, none of the other measurements are critical, and could be
altered depending on the timber section you manage to get out of your donor
plane, and whatever width of blade you are using.
Now our blank is prepared. We can start to set out, again it is important to do
this as accurately as possible using a very sharp pencil, and marking gage.
After all the marking is done we can start to cut some wood. I started by
excavating the mortise for the mouth closer, using a brace and center bit to
take the bulk out. A smaller bit from the bottom, and a slightly larger from the
Now that the mortise for the closer is roughly cut out, we can now start to sink
the main opening.