After gently wiping off the excess of the final Sistan bath (ADOX Adostab now) with a microfibre cloth from the emulsion side while the print is laying on a thick towel, I let the prints dry, emulsion down, on household fibreglass insect screens at room temperature for as long it takes to get them thoroughly dry.
Then I lay them, upside down and stacked by about 12 prints of the same size at once, under a pile of heavy marble tiles I recovered from dump container on a construction site (for free) for at least 2 days.
The prints are still somewhat undulated but that is so typically tactile for fibre prints so I leave it like that.
Anyway, the undulating reaction on the environmental atmosphere (moister) of the paper proves that the (natural-) materials, like rag and cotton, have still some life left in it, in contrast with RC paper (just like wood)...
I know it takes time, weeks even, but Festina Lente, it is analogue photography, and as ADOX says: "Good things in life are analogue"...
BTW, I regularly clean the screens, with a bit of Monsieur Propre and lots of water, as I fear that there is always some old emulsion (gelatine) that could be sticking and soiling fresh prints.