After doing some research and playing with the zoom on my yn560, when used in bounce mode the quality of light and output is slightly better at 24mm (output acording to the histogram).
However the zoom does make a large difference set at 105mm when in direct mode, but the quality of light sucks.
I've been learning alot of bouce stuff from this usefull site by Neil http://neilvn.com/
After learning from Neil's site I've managed to produce stuff like this by just redirecting the light:-
| HTTP response: 403 | MIME changed to 'text/plain' |
| HTTP response: 403 | MIME changed to 'text/plain' |
The ebay store has offered a replacement providing I cover the postage to China and back which I presume is around a month in time. So I don't think I'll bother.