Cool.

We had an M109 when I was at Riley 1984-1988. Not exactlly the upgraded A4 model but we did have an 18K BTU HVAC unit hanging on it for those wonderful Kansas summers and winters.

Pulled a 60KW genset with it, the Ops guys pulled the other 60KW with their 5-ton expando van, and the "systems" 53' trailer got pulled by a tractor rig for which I don't recall the model. I wasn't rated on the tractor but often had to back it for the operators that were.