As for R35 reliability, i can only assume there are lemons, like any brand i reckon. I must have done 40 to 50 track days in my R35 - i am not kidding - and with multiple track records (60.8 seconds at Wakefield fwiw) and i have had next to zero issues, the car has been rock solid. I've tried doing balls out track days in other cars, and they just aren't a patch on the japs. Perhaps i have been lucky, but i am more inclined to reckon the odd vocal few with issues are just unlucky bastards. It happens with all marques.