We have 3 Spirit packs (two people with bad backs and 1 person is 5’0") and for ECCC we drilled 4 holes and zip tied the shell to the Alice frame which works well but we’re building proper motherboards for it.
Any assistance on the size of the L Bracket I should get?
These packs are not heavy so I’d just get some cheap 1 inch L brackets. I 3d printed mine for my son’s pack and it’s about the same size but a lot heavier. Gorilla glued to the shell and works great.
I found some l brackets at home depot. They are not to wide and have pre drilled holes so tapping them was easy and the ones I got fit in the upper channels on the pack. I also made a mobo out of thin plywood.