Brake levers?

Is this the same sort of lever you mean? Knob bit is behind the lever.. cable runs through and down into caliper..

Aye, that's the sort. Maybe I'm wrong but with this set-up the cable itself doesn't get pulled - correct? So is the braking affected by the pushing down of the cable housing on the caliper? If this is the case, am I right in thinking the length of the cable housing has to be very accurate? And do I need a certain type of very rigid cable housing??

Thanks for answering, Hippy.