Summary

This is to fix a partly broken school bag (but might be used for any bag of similar size and material

Instructions

This thing I created because my daughter's school bag was partly broken and instead of waiting to have it totally broken (and buy a new one), I hope this support will hold it together well.
If you print it out in 1:1 size, the screw holes fit exactly with the M3 screws you might have left from your Ultimakter building pack :-)
As the initial printing of the screwholes caused trouble (the fan wind blew them away), I added a slight closing layer which you must hole-punch before using the thing.
For the two outermost screws you need two M3 nuts, for the other six of them you need no nuts - you just screw them through the T-sized part (from inside the bag) through the back, into the small tubes of the rectangle-sized part.

As you might see on the picture, the parts bent while printing - I have no solution for that, but in the end this had no effect on the practical use. But if you got a solution how to prevent them from bending please post it here.

Bagfix