Decoding Creality's locked Klipper fork
The K2 Plus runs a Klipper fork with a 1.88 MB Cython binary at the core of it. What is inside, how I got there, and what surprised me along the way.
Posts
Workshop notes, build logs, reverse engineering, and other rabbit holes.
MeshCore on Heltec and nRF52: off-grid, encrypted, solar-powered
A LoRa mesh that does not need cell towers, ISPs, or anyone's permission. End-to-end encrypted, kilometre range, runs on a battery the size of a credit card. Plus what it lets me extend into: server comms, sensor …
Sharing port 443 between a real website and a VLESS+Reality tunnel
A real public website and a VLESS+Reality tunnel on the same machine, the same address, the same TCP port. DPI cannot tell them apart, because neither of them is lying.
Handing my only GPU to a VM, and getting it back
Single-GPU passthrough on Linux is the constrained-hardware path. It works. Plasma does not survive it. Here is the trade-off.
Ansible-Bootstrap: declarative Linux hosts across any distro and hypervisor
A bootstrap that takes a host described as YAML and gives back a configured running server. Eleven distros, five hypervisors, one playbook, deterministic end state. Source on git.archworks.co/sandwich/Ansible-Bootstrap.
Three-layer GitOps on K3s, in production
How I run a 6-node Kubernetes cluster as one git repo, pushed to master, picked up by ArgoCD, and never touched with kubectl in anger.
Public services from a residential line, without publishing the home IP
A tiny VPS, a WireGuard tunnel, and an OPNsense at home. The architecture that lets a residential IP host public services without ever being the public IP.
Self-hosted LLMs and the context discipline that makes them work
Three concrete layers on top of a local model: model tiering, subagents with isolated context, and skills that wrap APIs as one tool call. The discipline matters more than the model size.
Learning FreeCAD 1.x by designing hobby rockets
Parametric CAD from scratch through one project: nosecones, fin sections, motor mounts, recovery bays. The YouTube channel that made FreeCAD click. The amateur-rocketry hobby it landed me in.
Building an ESP32 quadcopter from a public project, and what flight control actually feels like
Forking okalachev/flix as a starting point, printing the frame, learning the IMU pipeline, and getting humbled by every step between 'motor spins' and 'thing hovers'.