A pillar post for mounting a cutter wheel , comprising: a body having a fluid inlet port , at least one internal passage, a fluid exit port , and a fluid flow metering element , wherein at least a portion of the fluid flow metering element is disposed within the internal passage; wherein the at least one internal passage provides a path for a fluid flow from the inlet port to the fluid exit port , and the fluid exit port is positioned such that the fluid flow exiting the fluid exit port is capable to exit in close proximity to the cutter wheel ; wherein the fluid flow metering element is adjustable to at least a first position within the at least one internal passage and a second position within the at least one internal passage; wherein in the first position the fluid flow metering element causes the fluid flow to have a first set of fluid flow characteristics exiting the fluid exit port , and in the second position the fluid flow metering element causes the fluid flow to have a second set of fluid flow characteristics exiting the fluid exit port , and the first set of fluid flow characteristics is different than the second set of fluid flow characteristics; wherein the at least one internal passage includes a first internal passage and a second internal passage , the first internal passage extends from the fluid inlet port and intersects with the second internal passage , and the second internal passage extends from the fluid exit port , and the fluid flow metering element is disposed within the first internal passage ; characterized in that the fluid flow metering element includes an axial body extending between a distal end and a head , the axial body having an exterior surface, a central passage , and one or more lateral ports , and the central passage extends inwardly through at least a portion of the axial body from the distal end toward the head , and the one or more lateral ports extend inwardly from the exterior surface of the axial body and intersect with the central passage . a body having a fluid inlet port , at least one internal passage, a fluid exit port , and a fluid flow metering element , wherein at least a portion of the fluid flow metering element is disposed within the internal passage; wherein the at least one internal passage provides a path for a fluid flow from the inlet port to the fluid exit port , and the fluid exit port is positioned such that the fluid flow exiting the fluid exit port is capable to exit in close proximity to the cutter wheel ; wherein the fluid flow metering element is adjustable to at least a first position within the at least one internal passage and a second position within the at least one internal passage; wherein in the first position the fluid flow metering element causes the fluid flow to have a first set of fluid flow characteristics exiting the fluid exit port , and in the second position the fluid flow metering element causes the fluid flow to have a second set of fluid flow characteristics exiting the fluid exit port , and the first set of fluid flow characteristics is different than the second set of fluid flow characteristics; wherein the at least one internal passage includes a first internal passage and a second internal passage , the first internal passage extends from the fluid inlet port and intersects with the second internal passage , and the second internal passage extends from the fluid exit port , and the fluid flow metering element is disposed within the first internal passage ; characterized in that the fluid flow metering element includes an axial body extending between a distal end and a head , the axial body having an exterior surface, a central passage , and one or more lateral ports , and the central passage extends inwardly through at least a portion of the axial body from the distal end toward the head , and the one or more lateral ports extend inwardly from the exterior surface of the axial body and intersect with the central passage . <EOS>