Last time I did this it took ages with a pick and shovel and obviously the hole was much wider than necessary to accommodate the tools. Need to do the other side of the garden now and was considering either a manual auger (petrol driven too expensive for 6 posts) or a post hole digger which looks like 2 narrow shovels facing each other and which you drive into the ground, scoop up a bit of earth etc. Has anyone used these? Preferences? Thanks