Mine was low in the center too, which made it a real bitch to lap. I'd rather it be high in the center, and then flatten it out until the flat area was sufficient to cover the core. Even lapping it all the way, it would still take less time... but that's a mute point. 
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Does a radioactive cat have 18 half lifes? --Kenny
my pimpin' rig: ...previously poorly cooled...
486DX-2 66mhz @ 75mhz, 4Mb ram, shared, 256Mb hard drive
Onboard VGA, watercooled, of course
16-color monitor, labtec speakers, 28kbs USRobotics modem
Windows XP (think about it)
Maze 3, DDen GF3 block, Eheim 1250, econoline van HC, 1/2" hose w/ 5/8" fittings Comair 172mm fan
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