Hi, there!
I introduce backpack engineering for DIY/MYOG. My YouTube channel “Backpack Researcher” shows all making processes and explains why it should be better.
I will share with you the useful tips for backpack making based on published information with demonstrated evidence mainly in academia, my doctoral thesis, and the experience of R&D in bags & luggage company.
I hope you will watch and subscribe it.
https://youtube.com/BackpackResearcher

I have posted 4videos until now. And I will keep releasing new videos.
It is not for commercial purposes. Rather than it, I want to know the problems of DIYers while making backpack, since I am a researcher. So, please feel free to ask me.
And I would be really grateful if we will exchange information.