So. I'm making a thing for my rack, and I'm going to post some pics of the progress Its a spectral display - nothing high quality or exact - just some lights which will flash in relation to the racket I make. Like this one It'll be 1u and based on a 1u vented plate with some things fixed to the back of it - with the leds shining through the holes. I've done alot of image analysis of picture of rack fascia plates with vents to get one that matches up to the leds to perhaps avoid having to cut anything. Cost a fiver. Initial progress is 2x very inexpensive hobby kits to make simple spectral displays. (N.B. More expensive and complex/accurate kits exist, but my arbitrary budget is £20 or less so........) Which involve alot of soldering of tiny surface mount stuff (forceps, magnifying glass, steady hands etc) [you'll note my idiots guide to leds written where I can't forget it] I'm currently most of the way through the soldering the first one.