Plane a 1-5/8"(40mm)-wide and 8"(200mm)-long hardwood
strip down to a thickness of 1/8" (3mm). Mark the shape of the
covers on the wood as shown in the drawings and cut out the rough
shape with the Ryoba saw. Drill both ends of the pickup opening
with a 11/16" (20mm) Forstner drill bit and cut out the
material in between with a fret saw; then file and sand all edges
close to their lines. This task looks quite easy but I had to make
three pickup covers until I was satisfied with the look and the fit
of the pickup opening.
Small springs between pickup baseplate and cover ensure some
tension when adjusting the pickup height.