They're available on the project page.

Send the files to your favourite PCB assembler.

For my initial prototypes I had to steal these memory ICs off of actual Adafruit ItsyBitsy M4 boards, at $20 a pop.

Apparently I put the SWD connector on backwards for my first batch of prototypes ¯\_(ツ)_/¯ we'll be flipping this around.

Look at these lovely little gems.

Now that the connector's flipped and the memory's soldered on, time to mount it to the breadboard.

I like to snap my header pins off using pliers, because doing this next task with flush-cutters would result in 20 mini-metal-missiles ricocheting around my lab, and that would be counterproductive.

We're going to need:

20 x 1 Pin

2 x 3 Pin

Insert them into the breadboard as such:

Now lay your Breadstick on top.

Notice we skipped the Reset and Aref pins? Only solder them if they're important to you. Otherwise they'll just take up valuable prototyping space.

I like to solder at either end before working inwards.