i need to do a bypass on an N1, that has already beeing updated. Has anybody done one already?

I've tried and messed up my unit, many have successfully, be extremely careful. I would recommend letting an experienced person do it, b/c if you mess it up, your f*cked. Pay the 100bucks and let same day audio repair do it, they've repaired 2 of my units and they've worked perfectly since.