I tried VFT propagation using leaf pulling recently.
1) Uproot the mother plant.
2) Take leaves till the tip of rhizome.
3) Place in shallow LSF with mostly closed lid for high humidity. Box is placed in bright indirect sunlight.
Then... long waiting. After 5.5 weeks, a plantlet emerges.
50% success rate this round. It is the leaf that stays closer to the box opening producing plantlet. The other leaf rotted away, probably too wet.