Look what the postman just delivered to my door... my research/gamble payed off... it's a custom mouth piece / drip tip for the Aspire Cleito.. tight fit, and the cutout within the drip tip fits the metal thread on the Procore precisely, which leads me to believe this thread on the top cap is somehow a standardised part.
So those mouthpieces / drip tips are compatible/interchangeable:
- Aspire Cleito (lots of custom drip tips available, not compatible with Cleito 120)
- Joyetech Procore Aries (stock: black, slightly converging at the top)
- Joyetech Procore X (stock: black, slightly converging at the top)
- Joyetech Procore Motor (stock: black, straight, rounded top edge with little holes)
...and with 99% probability too:
- Aspire Cleito Exo (same metal thread as Cleito)
- Joyetech Ultimo (stock: silver brushed metal or black, straight)
- Joyetech Unimax 2 (stock: black, straight)
...and with unknown probability too:
- Aspire Nautilus X (seemingly has same metal thread as Cleito)