R31 Hicas is mechanical, not a whole lot to go wrong, only other real techy electrical things are electrically adjustable dampers which are easy to swap out with normal shit, 5 stack tape deck which n1gaf bout anymore, electrically adjustable drivers seat which mostly still seem to be in good working order and if it breaks easy to replace with normal shit. drivetrain is all really 80's Nissan/standard RB gear which is easy as to replace...