Bill, yes the drivers are NOW wired out of phase ( which is CORRECT) as shown on the most current schematic. They have to be because each section of the crossover introduces 90 degree phase shift for a total of 180 degrees. This is the same as inverting one of the drivers.
I determine/ confirm correct phase by inverting one of the drivers and then measuring the summed response. If the response drops 4-25dB in the crossover region when one driver is inverted the phase was correct before the change. ?If the repose does not drop but increases that indicates the driver are NOW correctly in phase. BUT, unless it is the woofer or supertweeter we are talking about the phase of the next driver will be wrong if the it was correct to begin with.?
For most it is easier, but not trivial, to trace out the wiring and make sure that the drivers are wired according to schematic.?
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I am familiar with the 521's and yes the drivers must move either toward the listener or toward the front wall simultaneously in order to be correct. Since they are on opposite sides of the baffle one must move towards the magnet while the other moves away from it. This technique reduces distortion from suspension and magnet circuit nonlinearities as the non linear motion cancel.
Speakon connectors ?are great!!!?
Charlie Conger