But I still don't understand how Rand could weave Saidar without being able to see the flows. I had the thought that since linking and using an adam create a similar scenario, that perhaps it's still Nynaeve's ability with the flows that makes them work, the same way a Damane is doing the actual channeling but the flows must pass through the suldam first. But, to my knowledge, Nynaeve didn't know exactly what she would need to channel, since Rand sort of just experimented with the weave.