So, today I had a bash at this wallet upgrade thing!
I have to say, reading through the posts was quite daunting at first, all this talk of fee credits, then cowboy tokens...
I was feeling overwhelmed, then I found the guide by @supratic on using coinos (TY)
So not sure if I've done it all correctly but this is what I've achieved...
The nwc option is configured with send only coinos nostr+string
(The recieve field is blank)
The Lightning option is configured with my coinos Ln address
When I zap a post, it takes it from coinos
But when I replied to a post, the 1 sat fee was taken from the SN native wallet.
It's a work in progress
I was just trying to get ahead of the curve because if I'm right in thinking, this upgrade hasn't been permanently implemented yet.
If I've messed up please jump in