As I have more time for building these days, I decided to replicate the new Scania R650 on 1/22 scale (Mack Anthem #42078 set scale).
The goal was very simple: have a recognizable shape and manual functions.
It is in a very basic 4x2 configuration. It has a V8 and a HOG steering. For this one, I decided to abandon the working steering wheel because it gave poor results on my Volvo FH16. The cab can be tilted and the rear axle can be raised to give a nice rake (inspired by @mpj). This tractor unit can be used with any trailer compatible with the Mack Anthem.
I plan to make a 3D model for this.
I'd like to build something more complex with it (crane truck, timber truck, etc.) but I have no idea what. Ideas are more than welcome!