I used to share the ramp with the Bluebell CL-44s at Borinquen (Puerto Rico) from time to time. They used to fly the various parts of jeans in from Greensboro N.C. which were then stitched together locally. The CL-44 needed a jet start unit and they had a wonderful contraption at Borinquen consisting of an old jet engine and various pipes and valves mounted on the back of a pick-up truck. I needed to use it one day to get my aircraft started (a DC-10) and I seriously doubted that it would work. It was magnificent!