Just started ordering some parts for my next project....hopefully it will come together....2 ideas to ponder....one with recessed tank...we will see where this goes after further contemplation....
$3.40 External Enclosure Case for Mobile Power Bank DIY - fuchsia / compatible with HP-0123 PCB board at FastTech - Worldwide Free Shipping
$3.01 DIY Empty Mobile Power Bank Enclosure for 2*14500 Lithium Batteries - batteries & controller sold separately / compatible with HP-0111 at FastTech - Worldwide Free Shipping
hopefully I can use these for my next attempt at a different style 20-d..... hobby modding is fun......
Will update as build starts....wish me luck.....

$3.40 External Enclosure Case for Mobile Power Bank DIY - fuchsia / compatible with HP-0123 PCB board at FastTech - Worldwide Free Shipping
$3.01 DIY Empty Mobile Power Bank Enclosure for 2*14500 Lithium Batteries - batteries & controller sold separately / compatible with HP-0111 at FastTech - Worldwide Free Shipping
hopefully I can use these for my next attempt at a different style 20-d..... hobby modding is fun......
Will update as build starts....wish me luck.....