kind create cluster
flux bootstrap git --private-key-file=C:/Users/Joe/.ssh/gitea --url ssh://git@gitea.home.joemonk.co.uk:2222/joe/gitops.git --branch main --path=clusters/kind

Kairos

Grab the latest image from https://github.com/kairos-io/kairos/releases, the image should have the format kairos-debian-bookworm-standard-amd64-generic-v3.1.1-k3sv1.30.2+k3s1. The main things we're looking for are the latest debian, standard, amd64, then the versions of kairos (v3.1.1) and k3s (1.30.2).
Burn to usb
Boot from usb, live install and go to the config webui
Add the public keys to the config (from ~/.ssh - ssh-keygen -t ed25519 -C "joemonk@hotmail.co.uk")
Put the kairos_config in, check the shutdown button and let it install
Remove the usb, ssh in with using the specific private key (i.e. from ~/.ssh - ssh -i ./kairos kairos@192.168.1.101 or add the following to ~/.ssh/config to just use ssh 192.168.1.101)

Host 192.168.1.101
    HostName 192.168.1.101
    User kairos
    IdentityFile ~/.ssh/kairos

Flux CD

flux bootstrap git --private-key-file=/config/.ssh/gitea --url ssh://git@gitea.home.joemonk.co.uk:2222/joe/gitops.git --branch main --path=clusters/kairos

DNS

We need to point a dns server to the server so we can access things via hostname rather than needing complex routing.

In OPNSense

Make sure Services > UnboundDNS is active and working
In overrides, add the host as *, domain as k3s and value as the ip address of the server

You should be able to access http://traefik.k3s:9000/dashboard#/ (at the time of writing, looking to route this properly)