Edit in Tinkercad: https://link.laberteaux.org/fan-speed-controller-5V
Full Build instructions are at: https://link.laberteaux.org/5015_5V_fan_speed_control

Love the XY-FS board and this general enclosure. However, my use case was for a wearable. As the USB ports on the XY-FS are not very robust to movement, cord tension, etc, I modified this enclosure to have a bit more heft, and protect the USB ports on the board. I also have a pair of extension USB cables (USB A M to USB A F), which I leave permanently attached to this device, and fill any gaps with either shims (attached) or hot glue.

Directions:

1. Print
   a. Part F Top USB 5V Fan Speed_v11.stl
   b. Part G BOT USB 5V Fan Speed_v12_emboss.stl
   c. Part H strap_clip_50_14_12.stl
   d. [Optional] Part K (shims, see below)

2. Gather
   a. Part M Short USB Extension Cable – 3ft https://www.amazon.com/Cable-Matters-3-Pack-Extension-Extender/dp/B00N9HRTFU (need 2 or 3)
   b. Part T USB Fan Governor Speed Control Knob ON/Off Switch Output range: 3V-8V https://www.amazon.com/dp/B0D97BW45B (Only need one)

3. Install Part T into Part G, as shown. It is installed correctly when the board is sandwiched between the board's shelves and clips, which should hold the circuit board in place.

4. Install Part F on top of Part G. Note that there are matching idents on Part F and Part G, which should snap together, keeping Part F and Part G connected.

5. Insert the male USB power plug of the 5V fan/blower into Part T.

6. [Optional] As it takes relatively little force on either USB port of Part T for them to disconnect from the board, it is advised that you “harden” the speed controller. You can use a combination of glue and shims Part K to achieve this.

7. [Optional] Glue, or otherwise affix Part H (the second clip printed earlier) to the final Fan Speed Controller, providing options of clipping it in easy reach when speed adjustments are desired. I use this as a wearable while skiing. Options (for me) include the collar of your outer layer, the chin strap of the helmet, the goggle strap, an outer pocket of your coat, etc.

8. Use Part M To connect the male USB port of Part T to a 5V battery/Powerbank.

9. Done