Common 993 problem, poor handbrake so full strip down and new parts including one guide tube which was a pain to replace. Reassemble o/s working fine but n/s not at all. Only difference was o/s cable was genuine Porsche n/s was aftermarket I'd had for a while. Pulled the n/s cable to find a plastic washer acting as a stop for the return spring had jammed in the outer cable. New genuine Porsche part ordered.
Often said, "You get what you pay for".
Often said, "You get what you pay for".