This was the second large mitre plane I made. The first prototype was the more attractive ‘improved pattern’ mitre plane. A plane that I immediately renamed the ‘deproved’ mitre plane.  It was the most disappointing plane I have ever made from a functionality standpoint... it is incredibly uncomfortable to use. 

The screw through the cupids bow bridge engages with an offset brass cup inlaid into the wedge. The action is similar to a drawbore – with the screw being the ‘peg’ and the wedge being the ‘tenon’. When you tap the wedge into place and turn the screw, you can feel the wedge being pulled forward a couple thou… a pretty clever little mechanism. 

The A7 shoulder plane and the Norris rebate mitre plane all use this same drawbore mechanism.