Dispersion characteristics' effect on overall sound

Dear Rudolf,
Have read your work "Open baffle 1.pdf"- very impressive study,you did word a big favor in a field.
Do you mind clarify problematic from page 14 " Next we add a rearward tweeter similar to the dipole upgrade from ORION toORION+"...
Did you wired that rear tweeter in faze or out of faze ?

S. Linkwitzin his LX 521 have wired rear tweeter out of faze to front tweeter.
P.S. was trying contact you for a wile and looks this forum -last resort . Welcome to replay me privately.