I was going to ask if you had noticed any difference with the feel of the pedal now the cable has been replaced. Seems to be that most of the time a heavy pedal is a result of a tired clutch cable binding against it's sheath. I installed a sports clutch in a car a few years back and the pedal gave my left leg a good workout until the cable blew. After the cable was replaced I could jab the clutch pedal like it was on a rubber band.