The Whole Stack, Plainly: Press, Store, Signal, Brain

Last lesson I handed you a house with four rented rooms and a landlord who changes the locks while you sleep. Press, store, signal, brain. This lesson hands you the cure, and the cure is the same four rooms, built so every key hangs on your ring.

I run the whole thing off a box that costs less than lunch. Every piece of it. I can teach this without selling you a thing because the parts list is short, boring, and mostly free, which is the exact reason the platforms never paint it on a billboard.

Here is the wiring, plainly. What each room actually is, what it's cut from, and the one piece you're allowed to rent. By the last paragraph you'll be holding the shape of the entire operation before you've nailed up a single board. The shape is the part they don't want in your hands.