I’ve added a new video of the fifth wheel on my Scania R620 model. I used a tiny hobby king servo and a small piece of plastic to mount it. It is actually a rather simple build compared to the tractors as the model was designed to be radio controlled so it has more than enough space for modification.

If you’ve any questions feel free to ask or if you need pictures let me know, I started a topic on the forum for a discussion if anyone is interested. I’m pretty much finished the lorry so hopefully I’ll have a video of it up soon.