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Yes Chris, that is a good description of basic collimation checks. The main thing is the vertical collimation, so look at a distant ( a hundred metres or more) distinct horizontal line - a fence line or a gutter or roof line is good.
Re adjustment - see where they are tweaking the adjustment screw in the image? Look in the same location on your binoculars. There is probably a rubber cover - just lift it up carefully and have a look to see if you can locate those screws - one on either side. For simple adjustment, you normally need to just tweak one of these a little. But don't worry about doing this if, when you test as they explain, you see that horizontal line (roof, gutter etc.) line up fairly well between left and right.
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