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We stuck a nail through the side of the sonatube to indicate when to stop pouring. we tried to make the height of the concrete the same throughout the row, but any differences can be made up when cutting the posts, so it wasn't an exact science. The important thing was to leave the sonabube as high as we could so that the angle of the mixer allowed the concrete to fall into it (or at least be able to shovel it out directly into the hole) |
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