Insert the QT Py into the mount by flexing the back of the mount.

Connect the QT Py, BMP585 and rotary encoder together with STEMMA QT cables.

Start by mounting the BMP585 to the front of the case with M2.5 screws and nuts.

Attach M2.5 stand-offs and nuts to the rotary encoder.

Attach the rotary encoder to the enclosure with M2.5 screws for the stand-offs and the nut for the rotary encoder.

Insert M3 screws into the two mounting holes on the QT Py mount.

Secure the QT Py to the M3 mounting holes inside the enclosure.

Insert the NeoPixel diffuser into the cutout on the case.

Put the lid on top of the case. It has a track that the case edge pops into.

Push the tubing into the cutout for the BMP585 sensor.

Insert the other end of the tube into the mouthpiece.

That completes the assembly!