If you mess up you can remove dependencies from your master by selecting the dependant parameter in the dependency editor and clicking remove selected...

So if I wanted to remove Kaiju and switch it to Lovin' Vein I'd select Kaiju in the dependant parameters field, remove selected, click start teaching, set the master to 1 and set Lovin'  Vein to one, back all out to 0 and click stop teaching. Lovin' Vein will now dial with Head_Nozzle when the master is spun. You'd probably want to rename the master, again in settings, to Head_Nozzle Lovin' Vein of course.