GridLeak measure of gap in residuals between padrows 12 and 14 vs. z shows about a ~1mm variation over all z:
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Signed DCA of straight up (|eta|<0.05) tracks vs. z shows about ~2mm distortions a z beyond +/-50cm:. Restricted to +/-25 cm the distortions are ~0.3mm with sigma of 0.4mm
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Signed DCA of all "good" tracks has a mean of ~1mm, sigma of ~3mm:
