Just to clarify... A chop block is flagged even with a FBZ still intact. B2 can be cut, blocked in the back and clipped by A5 as long as the FBZ exists. But if contact is made high by A6 on B2 and after a delay A5 hits B2 low, we have a chop block and a flag even if the FBZ is still in existence, correct?
WM
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