Not once you get the hang of it.I'm wondering if there arw any issues with the rayon and leaking vs cotton?
Rayon does not Swell like Cotton. It gets wet, but transfers liquid along its strands faster than cotton.
Everyone has <Their> way, and that's fine so long as it works. I use several Orchid tanks. Dual coils and large channels with 2 air holes right on the Deck.
I never place Rayon into the channels and very rarely have a leak. It took some practice, but finding the proper fit of the wicking make all the difference.