[flameout]

Note: I am not familiar with the FTC setup, so I cannot tell you anything about your code -- hopefully someone with FTC experience can chime in.

Motor braking won't actually stop a motor. It will make it hard to turn the motor quickly, though. Try turning it by hand -- if it's hard to turn quickly, then braking is enabled.

If that is your issue, then you should probably output a slight command in the "retract line" direction, to prevent it from unwinding.

I hope this helps.