Dyneema packing cube backpack question
I'm unable to get around these days without a walker, which requires me to have both hands on the walker while I'm out and about. I've been grounded from travel for a few months, but my doctor has given me the go-ahead for a trans-atlantic trip in April. Problem is, my packing strategy has been based on my pre-walker lifestyle. Typically I'd travel with the Tristar and the Imago for a personal item, but I find it awkward to have the Imago on my shoulder now. I've figured out that I can repurpose an old wheeled laptop bag as my personal item and bought a bungee thingee to attach the Tristar. But that leaves me without a day bag for after the flight. The packing cube-backpack seems ideal--it's a packing cube on airplane days, then a day back on other days.
My question is, how usable for a day pack it is, really? Could I tote as much as a 13" 2 and half pound laptop (plus a few light sundries) or is that more than it can handle? The website has 'light duty' and I guess I'm hoping that my conference-gear or day rample gear is within that definition. So, any advice from users would be much appreciated.