still not tested! or, only on breadboard up to now. i make my x0x along xoxio mod, and now i'm exactly before interconecting between them all altogether. still unsoldered tactiles, led-resistors and leds. i see the progress as this: (soldering in order) led-resistors tactiles sticking leds in their places (one led roughly soldered) installing i/o board (attaching the board) installing xoxio mod (attaching the board) final frontpanel fit leds fit into the frontpanel (hard-sticking, tough!) and soldering them to allign nicely. test. boom. ;) on a breadboard, i see 22K-33K-47K as most comfortable resistance i find. probably 33K is to be used (47 is too much and 22 is very bright yet). How do i test the leds in their places before i go on and finish the unit? i never turned on x0xb0x before. the software is from ladyada directly - so atmel is programmed, already.