Yesterday we needed to alter the pin-positions but it was quite tricky as the greens were saturated. This means that it is really difficult when you try and lift the core of the new hole you are making. This is because the water seems to create a seal which prevents any air from entering the cavity you are making and therefore the core is sucked into the hole and sometimes doesn't come up.
Our deputy head greenkeeper figured out that by making a small hole in the direction of the hole-changer until you make contact with it, you create an inlet that allows air to enter the base of the core. This prevents the core from staying behind and makes it easier to extract it too.
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