Lego 42160 final bw chassis with 2 speed gearbox

Hello, Final version 42160 chassis is here

2xbuwizz 3.0

4xbuwizz motors

2xPU L motors

2 speed gearbox 

First speed

Outer output on motors 16/16-differentials 20/28 and hubs

Max speed 14 km/h

Second speed 

Outer output on motos 20/12-differentials 20/28 and hubs

Max speed 18.5 km/h