Step 4: Embed the Photoresistor

Remove the ultrasonic rangefinder and follow the last half of step three to embed the photoresistor.

Make sure that the frame ring still fits when both sensors are embedded at the same time.

You can trim and fold the excess leather over the ring so that the frame ring is embedded inside a hoop of leather.  I used fabric glue to hold the flap down, but you could also sew it shut.
 
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