pawnii, here and the other thread. Sure, I've been thinking about putting out a kit. However, things do not just end up with the PCB. There are issues of housing, mounting, cabling, switch, indicator lamps and housing for the latter. E.g. with my own board I found that issues of protection against water are very serious. With 5+ layers of coating for the PCB, I might still get a short, disabling the circuit, after a year+ of the bike with circuit outside. Either I would need to solve these problems or the recipient of the kit would need to solve them himself.