Looks a lot easier than the bender things Uncle Ron describes.
http://www.aircraftspruce.com/catalog/topages/lancasterformer.php
check out their Airplane kits!
Frost do the shrinker/stretcher over here, i bought one a few years ago, its invaluable in our restoration work.
^^^^^ Ditto
Brilliant tool.
I couldn't have made my nose cone and wheel arches without it.
Paul G