never got a reply from Celestron-Germany. How odd... they're the same people as Baader here and Baader actually showed nice customer service in the past. Ah well. Who cares when Amazon has free returns on every order.
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While I have by now figured out plan B to perfection (the binoviewer thingy with my existing 500/6.3 mirror lens),
today, I will receive two (used) 60mm Travelscopes to give plan A the last test.
I feel a little bit of joy, even. Pre-Joy or what do you call it? Anticipation.
The €90 I can totally justify. I estimate another ~€10 to get them securely fastened in an aligned position on the tripod.
Might even be sturdy enough to be transportable and not lose alignment.
If that works well I'll get a month supply of daily contact lenses for €20 to compensate for my eye's diopter difference.
And thus will have Xx60 binoculars with exchangeable eyepieces, filter threads and diopter compensation for €120 instead of €800.