Boss TU-12 tuner mod

Something about the mechanical needle on the TU-12 tuner just works better than the LED indicators. I find myself using the TU-12 over any other tuner but on a dark stage it can be irritating to deal with. Here is a simple mod to add an LED inside to illuminate the needle. You can see how much extra light there is on the right side of the display where the LED was installed..

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