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That's been quite the headache from the sound of things Peter.
It's unbelievable that something as high end as the TEC180 would suffer from shift of all places at the flange. To my stupid brain I'd guess the mount holes which held the flange to the tube were oversized to make installation somewhat easier but allowing for the heavy image train to pull it around. Is it a steel or aluminium tube?
I'd expect something like that from my second hand Skywatcher 152 achromat, not something that I could only ever dream of being able to own.
I hope you have it all sorted and I'd love to see the resulting images!
As for Joshua, I really want to get his focuser adaptor for my GSO RC8 but haven't had the finances (and it's only a couple of hundred dollars, not high end pricing (actually extremely cheap)), one day. I've seen much of his work shown here, what an amazingly skilled fellow he is (Along with Stefan Buda, his projects and results are amazing too), the only baffling part with the focus adapter is could I collimate the RC8, I see so many negative mentions of the procedure.
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