The cab was part of my original purchase package. It came from the dealer. It was also dealer installed. It is mainly 5 steel panels (fairly heavy steel) all bolted together. The heater is mounted to the front panel, below the windshield glass and to the left of the steering wheel, and it's pretty much out of the way. Two heater hoses come from the engine compartment to the heater and they have shut-off valves inline with a drain petcock. Two adjustable louvers to direct the air flow. Most of the wiring harness is concealed within the cab structure itself. There is an electical control panel with fuses overhead, within easy reach, for lights and heater. The front wiper has the switch right on the motor. I wanted a cab because I live in a cold climate and plan on using this machine all winter (even though it has it's own stall in the heated garage). A lot of posters here live in a less harsh climate and really have no need for this additional expense. We are having 85º weather in October, but I KNOW we will get cold soon.
More than happy to answer any questions.
Steve