Good summary but what is not shown here is that once the lifted element "settles" on element below and all pins are in, the helicopter releases the hold immedia

Good summary but what is not shown here is that once the lifted element "settles" on element below and all pins are in, the helicopter releases the hold immediately. This is due to the calculated risk of something going wrong: workers on the pole can quickly move around if the unmounted pole starts falling, similar to lumbar can quickly change position when tree falls. With helicopter however, a violent pull of attached line could probably end up with part of helicopter being chunked out of the hull.