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I use a truss tube dob (20") which is even more variable than these collapsible dobs and it is really not a big hassle. Usually only takes 5 minutes once setup and if it is a long session I will check it again later in the night.
I formally had a 12" solid tube and had to check that each night also, so really not a big deal.
Once you have collimated a few times it is really quick
Malcolm
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