I'm looking to start a composting setup using 4-5 50gal drums, and I was hoping to just use grass clippings for my greens, and dried leaves for my browns during the spring, summer, and fall, since I always have an abundance of each. Would this make for good compost, or will I need to add other things as well? I always have things like bread, egg shells, coffee grounds, envelopes from junk mail, napkins, dryer lit, etc that gets thrown away. I just figured if I could use just clippings and leaves for 3/4 of the year, it'd be easier, since I can mow the grass and dump my bagger, and I can mow over the leaves, mulching them, and empty them the same way.