Grumpy_Mike:
If they are working fine why are you posting here that you have a problem?
They work fine when the servo and motor are running separately; I meant to say that there's no issue of too little power or anything like that, so I was hoping to get some more info on why 9V batteries are inadvisable.
Then either get some, or take up knitting, maybe electronics is not for you.
You really go out of your way to live up to your nick name, don't you? What a lovely community.