Hi all - I have a question about the practicalities of using fingerboard LEDs. I ask as I'm having some issues finding LEDs that are small enough height-wise to fit "in" a fingerboard... Originally I had planned to use 5mm LEDs but those are typically pretty deep - usually around 9-10mm not including the cable so I can't see that they can be used which leaves me looking at 3mm ones. Now even these are typically 5-6mm deep, which leaves a little margin for error as the fingerboards I use are typically 7mm thick. Actually, given that I plan to use "domed" LEDs, I would be sanding the top flat once they are installed which should remove a little height. Q) Has anyone come across any "low profile" LEDs, preferably with a flat top, or is 3mm "normal"? If I use the typical dot configuration (ie. single dots aside from two dots at 12 and 24) I end up with an array of 12 LEDs. The LEDs I have to test with are blue and have Vf=3.2v, If=20mA. So by my calculations, if I pair them in series and connect the pairs in parallel with a resistor for each pair, the whole array consumes 104mA, assuming it's powered from a 9v battery. Now given that a typical 9v alkaline battery has a capacity of approx 600mAh, that only gives me a battery life of 4 hours or so right? Q) Is this normal/expected as this sounds pretty short to me?.. Of course, I could go down the route of running two 9v batteries in series but it sounds kinda silly to be running multiple batteries just for LEDs! Lastly, I will be running fibre optic cable for side dots also (powered by a single LED in the control cavity. The stuff I'm using has a pretty small bend radius - I wonder if it would be practical to use this for the front facing dots also - anyone tried this?