Thought I'd post this as a few people were wondering about getting LEDS retrofitted to a neck but I couldn't find a thread where someone actually had. Just got my bass neck back from SIMS leds after they retrofitted side and face LED markers. Superb job - the fingeboard is ebony so I specified black dots to blend in with the board so they would be invisible from a couple of feet away. The dots are obviously finished flush to the board and you can't tell they are there to touch. And they are invisible right up to the point you switch them on. Wow, they are bright - bright enough to read by ! I specified that the side lights and the front face lights could be individually switched which cost me a little more but its pretty nice. the side lights are no where near as bright but give a good indication of where the frets are. The front face lights are big but the side lights are tiny little pin points of light. Its my Warmoth Gecko neck they were fitted to so I was quite concerned that they didn't cut the lizard inlay. SIMS were very good and planned the front face installation around the lizard - moving the entire row of LEDs down towards the bottom of the neck with the Double dot being slightly offset. Unfortunately I had requested an extra pair of leds for 'eyes' for the lizard but these were missed off, so the neck is going back in a year or so to have its eyes put in. I got them fitted as the amount of theatre work I'm doing is increasing - and the side lights will be very handy when I'm in the pit. Overall 9/10, the neck was boxed very well when it was shipped back to me and as you can tell I'm very pleased with the service.