this is a ripsaw bush (caterpillar all-terrain vehicle) assembled from models 42100 and 42129 and a few additional parts and two small ruber belts (1663 parts). Control with the Controlz app, but you can easily customize your favorite control app. Propulsion and steering are provided by 6 L motors and two Control+ hubs. The model has a working V12 engine, there are two working control levers in the cab.
The cab door and the engine compartment cover open manually.
on the main gearboxes there are reductions 28/20
On the gearboxes of the caterpillars there is a gear 12/12, you can easily change to a decrease in 24/8, 20/12 or an increase in 12/20, or even 8/24 with additional gears

After the purchase, a high-quality and interesting pdf instruction and instructions for setting up the ControlZ application will be available for download.
P.S. use “ripsaw6.1” instruction for assembly