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Hi Vin,
The AA website has photographs of two different scopes; I would personally avoid the design with a short overlap between focuser's flange and the carbon fibre tube, as it may lead to flexing between the tube and the focuser (Please look closely at two images in the second row under the link you have provided).
I had two brand new units of 80ED CF triplet from another manufacturer and both were flexing big time due to the way the carbon fibre tube was attached to focuser's flange. Replacing focuser won't fix that, but a good amount of epoxy will...
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