BY APPEARANCE:
PRS (2007 to present) – silver aluminum rails, silver aluminum extruded table sides, silver aluminum extruded gantry beam, e-chain.
PRS Alpha Control box serial numbers begin with PRSA.
PRS Standard Control box serial numbers begin with PRS-S.
PRT – powder coated blue rails.
PRT Alphas have aluminum control box with start and rest buttons integrated on side.
PRT Standards and V4G tools have a computer tower as a control box.
PRT Standard tools with the RBK upgrade have the PRS standard control box.

