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I replaced the teflon bearings as i was having heaps of trouble with the up and down motion of the scope.. going up or down it would "stick" and then suddenly jump over what it was stuck on. it was very hard to accurately point to anything. so i replaced them with skateboard ball bearings.
smooth as butter now. you do have to tighten the handles a little more now as its a bit too smooth. but once it wears in and you get used to it. no dramas at all.
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