I just added a ZAP to my Provari but more importantly a Tatroe Base. With this base I can opt to run just the base for a 18350 batt or the base and extension for a 18490 or just the extension along with the Provari extension and have a 18650.
This is with the Tatroe base and it's included extension running the 18490.

This is with the Tatroe base and it's included extension running the 18490.
