Extender-Q plus Adapter-Q $240 shipped CONUS- works fine with FC-60NZ (below)
though a bit back-heavy on that scope.
Also Tak FC-60NZ (accepts FS-78 2" adapter to use 2" accessories)
wit 5x26 finder(some bracket scratches on finder) and bracket
and tube clamp $825 + 1/2 shipping (prefer Bay area pickup/delivery).
Nice scope (selling to up aperature a notch)- in suburban light, splits Castor
and (barely) Epsilon Lyrae, shows multiple bands on Jupiter and the Cassini division,
on very good nights there are dimples in Plato, Looks very good at
120-150X, gets pretty soft at 240X.