Fig 1. Comparison of events passing W-algo.
Left: Jan ver B4.2.2 , full stats, includes Endcap away-cone veto.
Right: Joe, S4.19 almost full stats.

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Fig 2. Hint of Zs in the endcap? ET in away-cone in BTOW (top) and ETOW (bottom)
Left: all run 9 data, note the bump at ET 15-25 GeV in Etow.
Note BTOW has also a bump at 40-50 GeV , for both data & M-C. It goes away for M-C W-events.
Right: M-C Z events - you see a similar bump but 5 GeV higher.

The explanation of bump in ETOW may be just di-jets.

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Fig 3. Left ver 4.1 : the 1st shown to spin PWG, had wrong away phi angle
Right: ver 4.2s : after I found 5K eve/job limit & added pol patt P1

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Fig 4. Eta spectrum for final selection of Ws. W- is shown w/ error bars.