Rear brake drags (sometimes) Advice? Options

[Porsche Rescue]

When I got the car the right rear e-brake cable was disconnected from the caliper. Now I know why. The brake drags but not always. I intend to check the venting clearance first but it seems to me that if that is the problem it should not come and go. Is it likely that something is hanging up in the caliper (e-brake mechanism? pistons?) or could the cable be sticking sometimes? Or all of the above? Any advice appreciated.

[RocknRollFrenzy]

if it only drags when the cable is connected, then the problem is definitely in the e-brake linkage somwhere....i'd start by checking the cable. could be sticking/catching on something......pull out your drivers seat and take off the little cover just in front of where the cable runs through the fire wall. you might find that one side is pulling more than the other at the linkage here. you might also make sure that you're releasing the e-brake lever all the way. it could just be that your hand is bumping into something from time to time and you think its released before it really is. its a pretty tight space, and i've had that problem a couple times......hand bumps into the floor/edge of the seat before the brake is released all the way.

its probably not a spreader spring. i haven't had one on my left rear for a while, and it hasn't caused the brake to stick. for those more in the know than i, how important are the spreader springs?? should i replace the missing one? it hasn't seemed to have any adverse effects. (yet anyway)