i have been posting to a thread about my plan in general: https://community.ricksteves.com/travel-forum/general-europe/grand-tour-2020-june-august.
here i have a couple of luggage specific questions. i want to travel only with a carry-on. i am considering a small rolling duffel with shoulder strap and carrying handles for max mobility. surprisingly hard to find (for me so far). here's two that i would like your opinion on:
if you have other suggestions please post!