LED and LDR orientation

Facing the LED, you have it installed correctly.

I usually install them pointing more towards the lens part of the LED (except on the Delegate), but I think that should work fine.
 
You did the right thing getting a diffuse LED. Clear LEDs tend to shoot all the light straight up. The rule is: you want the maximum amount of light from the LED landing on the LDRs.
 
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