or will that be solved with tightening the cable?
roger that, you can keep that spring, it just makes it harder to view your 'freeplay'. The clutch arm only needs to push the ball less than a millimeter for complete action.
Adjust it by screwing out where the cable goes into on your motor.
check these animations out:
"The more you know, the more you can screw up" Heh heh!