I would block the pass gallery being fed from the front & use the crossover. evidently they figured out that not feeding the pass gallery from the front would keep the psi/vol high enough cuz it dead ends down there as opposed to flowing on to the pass gallery as to not starve the front mains/rods from that reduction in volume. You might go to www.moparchat.com then scroll down to & click on "circle track chat" then peruse Sanborns' oiling mods that are in a sticky at the top of the page (its a long read) if you ain't already then go to FABO & read Guitar Jones' oiling mods (alot overlaps)