Just started roughing out some steel and brass plate for making an wedged infill smoother and thinking about the best design for the bridge. For a built up body design (dovetailed or riveted) the options are a fixed bridge or a pivoting bridge.
Fixed bridge (Image from http://thebestthings.com/infill.htm)
bm100567.jpg
Pivoting bridge (Image from http://www.infill-planes.com)
Ridgeway-Gunmetal-Ebony-Coffin-Smoothing-Plane-1.jpg
Any thoughts on why you should choose one or the other?