This is just a side comment of mine, coming from a long line of farmers I guess -
Why do people bag grass? Unless you don't have a mulching mower, I can't imagine a good reason to do it unless your grass is so tall that the mower can't make it through on a mulching cut.
My neighbor bags his grass and has been doing it for years. His yard looks like it's starving for nutrients, and on the opposite side down the street I have neighbors who bag their grass and then resort to fertilizing their yards to make up for it.
It's more work, it takes longer, why bother?