With a true carry on sized addition to the line (not a box that compresses like the 55L) but an actual purpose designed carry on in a more rectangular shape, you’d be able to go anywhere involving flights without having to supplement with a more practical carry on bag
My second recommendation would be to replicate the tote bag line in the same material the duffel boxes are made of, as the waterproof material is overbuilt and too stiff for daily use.
I hope these suggestions resonate. It’s a great world class line. And I love that it’s conceived and built right here on the west coast. Proud to own this gear and look forward to many more additions.
Chris