I just built the Chalumeau and everything appears to be working as it should but I after looking at the build docs, I noticed it said to use a 5mm yellow LED. I haven't built a pedal with photo resistors yet so I randomly chose with this 5mm red LED and this LDR. My question is with this LDR would it make a difference in red vs yellow LED and also should the LDR be touching the LED or angled in any way? This what it currently looks like.