Glued and sewed a larger piece of gear repair tape to add fidelity to the ripped edge:
Then sewed the rip itself with fishing line (the strongest thing I could think of to hold the weight of the bag's contents, plus I just happened to have it at home:
As of this post, I've been using it for a week, and it's held up pretty well. I may add some sealant later to hold things in place.
Now all that's left to do is replace a missing zipper pull and fix some rodent damage to the front compartment... I may post about that at a later time
not sure how great fishing line is after repeated stretching but that's a great use of it!
pretty cheap too at like walmart in the sports section, used some to bascially create an umbrella strap since mine frayed apart