Great to meet a couple of new people in person today instead of just here in the forum.
Regarding the roll-aboard piece that fits in the smaller overhead intra-Europe requirements, the brand is U.S. Traveler and the dimensions are listed as 13.5"L x 7.5"W x 21"H.
Capacity is just under 30 liters, more if expanded.
Depending on the color and the day of the week it can be had for under $40, including a matching handbag 5" x 9.5" x 14" with a trolley strap.
So, it is usable and cheap, nothing to boast about but should do the job for minimalist packers. I'm trying it out on Frank's recommendation. One thing I notice right out of the box is that the handle has 5 height stops, and it feels light for a bag with wheels.