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If you are considering a tandem bar, consider a Triad bar instead. I
use a Triad bar, even though I only have at most two OTAs because with
the Triad bar you can put the heaviest scope directly over the center
of the mount. The Triad makes it simple to balance things in all three
axes even running a very heavy scope in the center and a light
refractor guidescope and guide camera on the side.
--- In ap-gto@..., "snightingale40" <snightingale40@...>
AP130GT nicely as a side-by-side arrangement