| I've learned to deal with it. When I saw yours, yours didn't look so bad.  Mine have lots of stress cracks now, but aren't giving me shimmy issues.  So I'll keep using them.  When I come off the track, my cracks have been more than an 1-1.5" long and I could fit my finger nail in some.   Some street driving seems to alleviates the crack openings (resurfacing?) and they go back to being a messy version of regular microcracked rotors. I've added air ducts, I think that helps some.  But if you've been ok so far, don't worry about it.  Just make sure you don't have any cracks that extend so that they have broken through the outside diameter.  We should plan another day with sacto and go.  I drove my red car on the street the other day at 10psi and was shit grinning.  It's fast, I don't even remember what it is like at 14-15psi! 
Cheers, Salah Aztec Red 300ZX Twin Turbo Platinum Mist Metallic 300ZX 2+2  
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