Click the following link to view the GT Flightpack Assembly guide for the DIY kit
https://drive.google.com/file/d/1LjF0bn8KS2dAH5eotf2ePI3QlUOQBLLq/view?usp=drive_link
All files except for the PCB are available and fully open source to create your own packs from scratch.
Files can be found here: https://drive.google.com/drive/folders/1321Nv1WMDkpj3YnGl1_hZASW2exHYp8q?usp=drive_link