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Originally Posted by elusiver
from what i've read roller bearings are good for hand pushing but they have a tendancy to be too light.. and move with the wind. Simple way to counter this would be some sort of breaking mechanism. Or add something to give it abit more contact friction.
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Some of the GS dobs came with roller bearings and some recommend a small piece of carpet or similar between the ground and top boards to create a bit of friction. You'll certainly need something so the scope doesnt 'roll downhill' or move in the wind.