Two things, the throat hit rightnow seems a little harsh
Drop Nic. level or wattage or both.
I like the idea of the really small unit.
There are a lot of great little devices out there that are smaller and in my humble opinion, better built. Take a look at this thread: https://www.e-cigarette-forum.com/forum/threads/little-itty-bitty-mods-under-100.640761/unread