Hi, just starting to get materials all rounded up for a new shed/workshop. the size is kind of weird as the only place i can have it is at the side of my house but it goes from 10ft wide all the way down to 4ft at the bottom end of the house and its 24ft long. what thickness should i make the concrete for the cnc machine? i am having the machine at the widest part so i was just going to make that area the thickest to save money.