#1
Added blue LED's into my M-10. Can all be turned on or off or into my favourite mode which turns on the LED on the fret the string contacts.

This was a while back and one of the LEDs blew since I wasnt too experienced in soldering but will be rebuilding it

On top of that I added a toggle killswitch and a button killswitch as well as the blue LED pickup that responds to sound

https://www.youtube.com/watch?v=GV56qhKO_v4
#2
How did you put them into the fret markers?
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Recording gear:
Yahama Hs8
Saffire Pro 40
Shure Sm57
Shure Sm7b

Guitar gear :
Ebmm BFR7
Axe fx XL+
Walrus audio Janus
Ibanez Ergodyne
Black Market Custom cab