I’ve had the backpack for three years now and no complaints. I think it’s the 18L model?

Peak design makes some really great bags, I also have the chrome bag and camera cube but it eats up a lot of space in the bag

I have a non e-bike cargo setup that weighs roughly 50lbs and I live on the 2nd floor. Gonna install a “ramp” on the side of my stairs to help roll it up and down. Something like this but homemade. I’ve also seen people use heavy pvc pipe