Hi MidiBoxers There are allready tipps out there how to make illuminated buttons but i like to show how i made them. This are "Ink Cups" from tattoo machines. They are very cheap (100pcs about 2-3$) and available in different sizes. I filled them about 4 mm with hot clue. The LEDs are bended above tacticle buttons like this way. Now use a soldering iron with an old soldering tip to head up the center part a little bit (about 1mm deep) and put the cup on the LED. Done!