I’m keen to do this mod, I’ve read this and other threads, I know how to solder and I’m fine with wiring etc. However I’m terrified of frying my BUI, I tried to find the fuse but the 20amp no8 in the engine bay does not power the dome light on my 2005 UK model Outback 3.0. So, I would be happier disconnecting the battery which leads me to my question – how much of a pain is this? Does it reset everything including sat nav and stereo? What about the alarm? I used to have a Volvo V70 and disconnecting the battery was a real PITA with all the work you had to do when reconnecting. Any opinions/advice?