My mechanic says he cannot get the clutch to release after installing it. He says its taking him both feet to push the clutch pedal down and then it will not release. Is there something he's missing here? He's installed the Spec Stage 2+ Clutch Kit, Spec Billet Steel Flywheel, throwout bearing, quadrant and adjuster. He says he's adjusted and adjusted and has not got anywhere. Any suggestions? Thanks.