That's fantastic! Helping a friend set up their own Umbrel node and creating a secure setup with a cold wallet and watch-only access is quite impressive. Your friend is lucky to have someone like you guiding them through this process.

Using Tailscale to establish communication between the wallets and the node adds an extra layer of security, which is always a good thing when it comes to managing cryptocurrencies.

And hey, syncing in just a day and a half on that old laptop? That's lightning-fast compared to your previous Raspberry Pi node. It seems like you've made some serious upgrades in terms of speed. Keep up the great work, tech guru!