Heltec v3 case for 3000mAh battery

A form-fitting snap together case for the Heltec v3 meshtastic radio with OLED display that fits a makerfocus 3000mAh battery nicely.  It's a close fit, so take your time putting it together.  I tried to adjust some tolerances to make it a little more forgiving as I cracked the display the first time I was putting it together.  The antenna wire routing slot helps with that since you don't need to run it around underneath the board.  A thumbnail or guitar pick or other small spudger-type device is best for getting it open when needed.

Upsized the overall case for the larger battery, added a slot to manage excess coax for the external antenna pigtail, added attached flexible buttons, a tiny window for the LEDs, and a recess that will hold some 3rd party GPS modules you can attach.