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Replacing flex couplers and aligning
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Add a replacement flex coupler to an orbital lug
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Push the lug into the nose bridge and align them with a rod (or round file) of 2mm diameter. Give it a wiggle to assure the alignment
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Use a 2mm round file to align and smoothen the pairing. Don't grind it down: you still need a press-fit for the replacement pin to stay in. But you want to give it a good cleaning and you need perfect (!) alignment to successfully re-insert the new pin.
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See step 11 for any mistakes you can make here, before proceeding to step 10.
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