I am putting my z back together after a pretty hefty upgrade list, everything is done except I keep getting leaks from the banjo fittings on the turbos. I first went to kragen and got copper washers that seemed to be close to the factory size, but the leaks were still there just not as bad as before, I have resorted to purchasing them from Nissan and the banjo bolts, are the crush washers that sensitive that I need the factory sized ones or am I going to have to purchase Earl's fittings to correct these leaks?