Apparently, not only do you need to be mindful of your mirrors, but your hands too!
My left hand / pinky made contact with a car mirror today during my commute home. Apparently, I miss judged my clearance. I feel / felt terrible
I stopped as soon as I made contact and inspected the mirror. It was fine. I gave the guy an apologetic hand gesture. My hand / finger is fine. Fortunately, knowing that the scooter bars / mirrors are broad, I was going slow while filtering through. Going forward, I will have to be more mindful that I do have not have as much clearance as I perceive to think I do.
FWIW, I have a sport bike too (for weekend fun), and have split with it, and never had an issue.
<edit> Now that I had some time to calm my nerves, and slept on it. Reflecting back, and playing it over and over in my head, I may be speculating here, but it's quite possible the driver to my left narrowed the gap (moved in on me) just as I was passing his passenger door and or mirror.
I feel I have a good sense of seeing / knowing whether or not there is a decent distance / gap between cars as I approach. Typically, if I feel the gap is too narrow (or not enough room), I fall behind a car (left or right), stop as I reach the mirrors, or switch lanes to filter through and continue my way.