[wdfifteen]

HD sells mixing boxes (plastic troughs) get a couple bags of concrete mix, one of the boxes, and a flat shovel (the shovel is rectangular, not rounded). Those items and your trowel are all you need. Use the shovel to mix the crete and shovel it into place. Put 1 3/4 bags of dry mix in the trough, use the shovel to make a bowl in the center. Pour half the recommended water in the “bowl” mix mix mix, add more water until you either get the right consistency (a heavy paste) or you over do it. If it gets too soupy add some mix from the 3/4 bag you set aside. Shovel into place. Smooth with trowel.