How to get the pointer to an object from a parameter pack

I'm having trouble with getting 2 different objects of the same type to have pointers to different objects using a parameter pack. Here is Controller.h:

using expand_type = int[];

template<typename... Ts> class Controller {
public:
    Controller(int i, string s, Ts... args): id(i), name(s) {
        expand_type{ (add_component(&args), 0)... };

    }
    void add_component(Test2* a) {
        device_.push_back(a);
    }
    void print() {
        cout<<name<<":"<<endl;
        cout<<"================="<<endl;
        for (vector<Test2*>::size_type i = 0; i < device_.size(); ++i) {
            cout<<device_[i]->print()<<endl;
        }
        cout<<"================="<<endl;
    }
private:
    vector<Test2*> device_;
    int id;
    string name;
};

and here is my Test2.h:

class Test2 {
public:
    Test2(): x(0) {}
    Test2(int a): x(a) {}
    int print() const {
        return x;
    }
private:
    int x;
};

My problem is when I make two seperate Controller objects, they share their Test2 objects in their respective vectors. Here is my main:

int main() {
    Test2 b(69);
    Test2 c(666);
    Test2 d(943754);
    Controller<Test2, Test2, Test2, Test2> x(2, string("Peter"), 70, b, c, d);
    Controller<> y(2, string("Pietje"));
    Controller<Test2, Test2, Test2, Test2> z(3, string("Jan"), 909, 808, 1, 2);

    x.print();
    y.print();
    z.print();

    cout<<"hello"<<endl;
    return 0;
}

then the output is:

Peter:
=================
0
808
1
2
=================
Pietje:
=================
=================
Jan:
=================
0
808
1
2
=================
hello

I want the different objects of Controller to have different pointers to different Test2 objects, and I'v no clue how.

Also as a side problem my first pointer always becomes 0, unless it's the only object in the vector.

Any help is appreciated!