here is a smal thing that i have build for the Vietnam era in Wächtersbach.
The kit said 1:15...but its more 1:18...but all right.....
...i build 3, and after a time in dicided that one shoud drive by RC......
So i start:
This are the 3 Mules:
One was a diffrent company, but the same "spritzling", but with:
Also ckekt them in the air with the Huey:
And here it becomes RC, an old Siku Control gearbox: A smal servo: Speedcontroler from WPL Truck:
Accu and reciever are on top:
And with some "Tempo sheet" whitglue and color hide it a bitt:
It drives well, but the steering is not that good...cause its a bitt stiff, and the gear has no diff´s...so well its more for show than drive a lot.
Here is a smal video how it drives and has some brother to pic it up

https://www.youtube.com/watch?v=ed8Z520UrNM
And first test at home:
https://www.youtube.com/watch?v=u4DplfNNy_8
Greetz, Andy