I have always been interested in the Tucker Sno-Cat range of vehicles with their articulating 4 track system (read more at Sno-Cat). This model is based on the 2000 series Sno-Cat, and includes the snow tiller found on the more recent Trail Boss models. This is a significant iteration of a previous MOC that I created a number of years ago, making use of all of the new orange parts that have been gradually released by Lego over the years.
This model utilises Buwizz3 (it could be adapted to run with Buwizz2) to drive a number of functions:
4 track drive
all track steering (including steering wheel in cab)
raise / lower front snow plough
raise / lower rear tiller
PTO to the rear tiller when model is driven to spin the snow smasher (not the technical name for this part)
The model also includes a suspension system and articulating tracks, opening doors, additional controls on the Snow Plough to enable forward/back and horizontal tilt of the blade. Both the Plough and Tiller can be removed to allow for new attachments to be connected to the Sno-Cat.I have used system bricks a bit more extensively that I have ever done before in my technic models to capture the details, both external and inside the cab.
A few pictures below and some more at https://bricksafe.com/pages/PvdB/mocs/tucker-sno-cat
Also on https://rebrickable.com/mocs/MOC-151766/paulvandebulk/tucker-sno-cat/#details
A short and very (very) quickly put together clip https://vimeo.com/836967463