Richard Nice, who among many other things makes guitars, recently showed me this attractive plane that he had designed for shaping soundboard braces and harmonic bars. He made it from an off-cut of beech and a discarded cutter from a plough plane and, so that there could be no doubt about its provenance, he signed it too.
The screw adjustment is simple but ingenious, depending only on a carefully sited screw tapped into the back of the plane and a slot cut into to the upper end of the iron.
The plane is comfortable to hold and works well. Its narrow cheeks enable it to take shavings from the lowest part of the brace and produce either a triangular or gothic arch section according to your preference.
Finely Strung 
One Comment
That’s a beautiful tool. Never having made a plane before, but wanting to, this might be a good one to start with.