Thread: Replacement O-Ring bumpers on SW Dob
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Old 25-01-2016, 01:21 PM
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billdan (Bill)
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Join Date: Mar 2012
Location: Narangba, SE QLD
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Hi Darren,

Just had a look at my DOB and the O-ring definitely sits in the groove, and yes it seems to do nothing.

I thinks its only there to protect the OTA from getting scratched by that extension tube.

Regards

Bill
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