I have cut down a Zip Dee by 2' to get it to fit my '59 Trade Wind. It was from a '66 Overlander that had seen better days. Only one end can be cut down without affecting the spring because its about 4' long inside the tube and attached to only one end. When the awning is attached to the trailer, its the front end that can be cut down. My awning guy did it when he cut down the fabric and re-seamed it and he did it for less than $100. As Pete wrote, "I call that a bargain".
BTW: I would love to know more about your Trade Wind. Any pictues available?
4CU 2699 / AIR 10 / TAC AZ-1
I'm haunted by aluminum.
Charter Member of the 4 Corners Unit.