Sure, but it all requires implementation on both ends. We’re working on one end right now and should have it done very soon. Plus the connection can be used for plenty of other things in the future, it’s a very versatile tool. If you want to implement the other then I’d happily put sats on getting NEC into Zeus as well. I think the Nostr/relay model is a fantastic backup connection method honestly. I think doing P2P first, then falling onto relays if it fails for some reason could be a really reliable & yet decentralized design. 

 as it is right now, holesail is essentially a server, so it takes implementation on both ends.

you are wanting the zeus app to create the tunnel from the outside without any server side implementation? 

 You need to implement holesail-client / holesail-server in Zeus wallet using Bare-kit. 

I have a working example of it here https://github.com/supersuryaansh/hyperclip-android/ 

 We are already working on the other side of it. We just don’t have it in a mobile wallet yet.