I think the adapter/booster ONLY adapts the LEMGTH of the BOMB/Container with its push rod lenght for the Master C.
With my Booster I followed advise to have VERY little play betwenn pedal push rod coming out through the BOMB and the master cylinder entry level.
Cylinder in Master is now at NO PEDAL move at ZERO STATE (retainer ring level!!!) (think this is what I understood from Chuck/Bosswrench's statement).
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