Truly bizarre. I checked the cashu.me string and it contains 3 relays:

relay.damus.io

relay.8333.space

nos.lol

Only two of them wanted to connect (damus and nos) but even when manually edited the string to remove all but one relay, it still never showed a balance.

Aborting this mission for now, if you have any other suggestions on how to get a cashu wallet to work with NWC in Damus, I’m all ears, but so far I’m 0 for 2.