This build is heavily inspired by LBM-FPV's 6inch longrange box quad.

features a 5mm unibody frame with 2mm top and base plate.
frame designed to hold 7inch prop, and can barely hold 7.5inch prop

Designed for DJI O3 system
features a Gopro mount on the camera print parts

features 2 915mhz T antenna mounts for TBS or Elrs Diversity reciver
All 2 Antennas are strategically place to maxmize signal coverage and away from props

this frame is designed for longrange cruising.
using the INAV and a MicroAir M10 GPS with Compass, so PosHold and RTH will make longrange flight much safer.
the motors are over proped: 2306 1300kv driving 7inch props, So don't push it too hard~~

the All-Up weight and the W/O Battery is 450g, and with a 450g 21700 6s pack, take-off weight will be 900g.
and the flight time is around 20 min cruising at 60~70 km/h, with the flight efficiency at 140mah/km this setup can cover 20 km in range
All the design files can be found in:https://www.thingiverse.com/thing:6094983