Look, just my opinion... If he is gonna fight to get you away from his super then it will require a court order... You seems smart enough to do all the paperwork and self represent but is it worth it? your call... Personally, getting on my life seems like a greater priority...
But - kind of give you some leverage... You can tell him you're not interested in his super as long as he agrees to work with you to get consent orders around the child... Now with a 9-year-old, you might wanna ask yourself is it worth it... Again, what purpose? Doesn't seem like you're worried about him not returning the child and at that age, things are simpler than dealing with little ones...
So next time he asks for the kid to visit agree, but ask for a mobile number and residential address. Both reasonable requests - true...