Hi all, I've got a Metz in question in excellent condition, with powerpack etc. I also have a very rudimetary manual with it. I want to use this flash in manual mode, but it seems it's giving me the same output whatever I do. I have followed a manual, turn the big white wheel on "M", locked it, and tried to set the strength with the large wheel on top of the head (outer one), but it makes no difference.. same strength. I've tried to fiddle with ISO knob next to white one, tried other one on top of the flash- same.. Am I missing something - something else switched on/off? I know this thing can do manual!! It is in such a good condition it's unlikely to be broken. Any suggestions?