A suggestion for steam bending:
Take a length of drain pipe long enough to accommodate your stave and blank off one end, insert stave, set this on a slight incline open end down, take a wall paper stripper remove the 'thing' off the end and insert the hose into the drain pipe add a rag to ensure that the steam distributes equally along the whole length of the pipe and you have one very efficent steam box, leave for ten minutes and bend away.
Beware whole issue gets VERY hot
Do not seal both ends of pipe, ensure that steam pressue and air preasure can equalise
Cooking times vary quite a lot but ten minutes is a good starting point
This also alows you to bend the whole stave in one so you could also make a former to add some reflex to the ends
Pothunter.