"Spartan" is an understatement when describing an M-920's interior. There wasn't even an Exhaust Gas Temperature gauge on the (olive) drab dash. Notice the shifter for the Caterpillar 7155 tranny, with 16 forward and two Reverse gears. Since there is no conventional clutch in this setup, the left pedal activates the Jake brake. Soni installed a set of Bostrom air seats to minimize spinal compression since the suspension is nowhere near its capacity in this recreational use.