Thesas O2 is an alternative housing for your Mod in combination with the Thesas open source and open hardware project.
Thesas open source is teensy 3.2 based, so you can adapt the steering perfectly to your needs.
To build the mod you will also need the Battery holder for Thesas O2.
What else you need, you will find in the assembly instructions.
The assembly instructions can be viewed here: buildthesas_o.htm
or downloaded here: buildthesas_o.pdf
additional informations you might find here
Please be aware, the Thesas O2 might not be safe, vaping might not be safe, so vape only if you are an adult and if you are conscious of the risks.