A pillar post (26, 126) 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 (34, 134), wherein at least a portion of the fluid flow metering element (34, 134) 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 (34, 134) 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 (34, 134) 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 (34, 134) 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 (46, 146) and a second internal passage (48, 148), the first internal passage (46, 146) extends from the fluid inlet port and intersects with the second internal passage (48, 148), and the second internal passage extends from the fluid exit port, and the fluid flow metering element (34, 134) is disposed within the first internal passage; characterized in that the fluid flow metering element includes an axial body (52, 152) extending between a distal end and a head, the axial body (52, 152) 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 (52, 152) from the distal end toward the head, and the one or more lateral ports extend inwardly from the exterior surface of the axial body (52, 152) 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 (34, 134), wherein at least a portion of the fluid flow metering element (34, 134) 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 (34, 134) 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 (34, 134) 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 (34, 134) 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 (46, 146) and a second internal passage (48, 148), the first internal passage (46, 146) extends from the fluid inlet port and intersects with the second internal passage (48, 148), and the second internal passage extends from the fluid exit port, and the fluid flow metering element (34, 134) is disposed within the first internal passage; characterized in that the fluid flow metering element includes an axial body (52, 152) extending between a distal end and a head, the axial body (52, 152) 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 (52, 152) from the distal end toward the head, and the one or more lateral ports extend inwardly from the exterior surface of the axial body (52, 152) and intersect with the central passage.