Great to see that process from one end to another. I only have one bit of constructive advice after reading: Seems like the top flap should cover the full openi

Great to see that process from one end to another. I only have one bit of constructive advice after reading: Seems like the top flap should cover the full opening of the bag, plus a little more to account for wind blown spray and drizzle. The early designs clearly show some slight overhang, but the final prototype appears to show a gap in coverage at either side.