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Bazooka there is 2 types of 12s. 1 has a cooling fan (for faster cooling of the main mirror) and a crayford type focuser. The other has no fan and a rack and pinion focuser. I think there is still an option on plate glass/BK7 for the main mirror.
Not sure about the 10s.
Bintel and Andrews dobs are both gs.
I have to add that there are issues with the gs mount. As the mount is flexy and the alt/az movement leaves alot to be desired.
They can be altered easily depending on what you can put up with.
I think bintel supply the scope with 2 gs eps. Andrews supply a lesser standard of eps. Bintel DO collimate the scope prior to delivery which I think is important for a noobie.
As for size, an 8" can be mounted on an eq mount easier than the 10 or 12. But the large ap of a 10 or 12 will give better views.
Keep thinking and keep asking
Slice
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