I have a brand new speedy 30 in DE arriving in the mail today, but then I got to thinking maybe I would rather have DA... But I think one thing may put that to bed for me. The corners of so many of the preloved ones I see have turned white (from what I've seen, it's from "rubbing"). Is this inevitable? I don't ever let my bags run into things, to the point of OCD. So IF you don't let the corners scrape anything then will this happen? Or is it a canvas problem? Thank you!