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Old 27-01-2021, 12:00 AM
Rerouter (Ryan)
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Rerouter is offline
 
Join Date: Jan 2021
Location: Sydney
Posts: 87
Seems like a good servicing guide can be found here,
http://polluxchung.com/gso_crayford_fix/

My best guess is some damage or mark on the focus tube if its only in 1 location, if its spaced about every 1.5cm then it would be on the roller,

I would say tear it down, inspect for damage, and try and polish or file out any high spots it might be getting stuck on.
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