Okay, well I would probably suggest you look at separating the items in most situations, for several reasons. I suspect it may be handy and practical for space saving.

Part of why I would recommend the separation is the bag itself for starts. At 70lb you may find yourself knocking it around quite easily, and fast. I do not know your physical size, but a 100+ bag is usually a good place to start.

I do notice that it is a dbl end bag, so this may counter act it's weight some.

Is space an issue? Would you consider separating, or is it too late?