I would not model my 2hbh on Ferrer. Not only does he hit with a wide separation between the hands, but also he bends both arms a fair amount at contact. It works for him, but I see it as a more defensive control shot.
Separating the hands may allow last second adjustments to the racket face but it is a method of choking up on the racket and therefore makes the racket shorter. If you are weak this may give more control, but it comes at the cost of racket head speed.
You can go back to having your hands together if you want, but you'll have a transition period to adjust to the older technique.