The
Arfon brothers bent the metal for their land speed record car around a tree trunk.
Consider a full size top piece with a underhung strip riveted to the back edge. Turn a flat plate into an airfoil, plus the mechanical advantage of the fasteners not being in a straight line.
A Magnahelic gauge can be simulated by two pieces of surgical tubing, a double-stoppered flask and a webcam. Technically, a downward-pointed U-bend in a single tube marked off in inches.