Thank you so much for your kind words : )
That's a great question. In fact, Between the Skies emerged from my attempt convert Any Planet Is Earth to weird-science-fantasy. In brief, I went through all the setting material in APIE, essentially a series of tables, and create science-fantasy versions of each element/table. In the process, I ended up expanding things, adding new approaches etc. But the skeleton that I built from was extracted from APIE. And I think you could absolutely do the same thing with BtS. I can't say it's not a ton of work haha - but you can, at least, use it as a guide for all that work.