Quantity   Component name
1 × Eurorack Case I'm using a 60HP Moog case from FoundSound: https://foundsound.com.au/products/9505
2 × Eurorack Rails For making the case DIY, or as part of the adapters to go down from 3U to 2U or 1U, I'm using custom lengths from SynthRacks: https://synthracks.com/shop/eurorack-rails
1 × Controller For connecting the electronics to the PC, some kind of device that can emulate or act as a USB HID device for DInput, XInput, etc. I'm using an AdaFruit ItsyBitsy: https://www.adafruit.com/product/3800
1 × Panel-Mounted Rotary Potentiometer For axis values. I'm using these 10K rotary pots from AdaFruit: https://www.adafruit.com/product/562
1 × Knobs For making the rotary potentiometers easier to hold. I'm using these 20mm ones from AdaFruit: https://www.adafruit.com/product/5527
1 × Mini Analog Joystick for 2D axis control. This one from AdaFruit is self-centering: https://www.adafruit.com/product/3102
1 × Rotary Encoder For continuous discreet increments and decrements of an axis, etc. I'm using this panel-mounted one from AdaFruit: https://www.adafruit.com/product/377
1 × 6mm Panel-Mount Switches There are several options here: you can get these ones from AdaFruit: https://www.adafruit.com/product/3221 but they only have the small-handled latching on/on ones. AliExpress has more options: these ones come in long handled variants, and have on/mom, on/on, mom/off/mom variants, and have fast delivery: https://vi.aliexpress.com/item/1005004367116021.html and these ones are my favourite because they have a long-handled on/off/mom variant but with a slightly longer delivery time: https://vi.aliexpress.com/item/4000512396094.html
1 × Flat Wafer Head M5 5mm Screws These are for if you are using the 3U to 1U or 2U adapter PCBs. These screws are from AliExpress, and have a thin head to ensure they fit within the profile of the 1HP module width of the adapter PCBs: https://vi.aliexpress.com/item/1005005070119421.html
1 × Rotary Selectors I haven't found a use for these yet, but for certain games they could be handy I suppose? I bought this one from AdaFruit: https://www.adafruit.com/product/2925
1 × Toggle Switch (with cool missile cover!) These things are so fun to use! I like this one from AdaFruit: https://www.adafruit.com/product/3219
1 × Mechanical Cherry-compatible keyswitches Who doesn't need buttons to press? You can get these just about anywhere these days, but so many of what I've bought has been from AdaFruit, so to save on shipping I've gone with these ones: https://www.adafruit.com/product/4954
1 × Panel-Mount Slide Potentiometers These are so useful! I have a few. These 75mm ones from AdaFruit: https://www.adafruit.com/product/4219 and these 45mm ones also from AdaFruit: https://www.adafruit.com/product/4272
1 × Metal U-Shaped Rod Handles I've bought these for the V2 version (which I haven't built and tested yet, soon!), and there are a few. This one has a 25mm variant that fits in the 1U profile: https://vi.aliexpress.com/item/1005007242440186.html and this one has a 60mm version which fits for 2U: https://vi.aliexpress.com/item/1005007166949940.html and this one has a 100mm version that fits for 3U: https://vi.aliexpress.com/item/1005006958288072.html