I was going to reply when I saw this a week ago, but I've had the flu just after recovering from covid - and when I saw you had found THE boot I had just enough energy to yell into the universe "THANK #&$*%@# GOD!!" and toss my phone away from me God forbid I ever see a shoe tread pattern again.
So many people here, me included, put a ridiculous amount of hours and DAYS into this, with barely anything to go on. I really felt it would never get sorted. Thank you so much
@dirt_rat for not giving up!!
Hopefully this helps the investigation, and I'm sure we've all honed some new skills and knowledge should another mystery shoe come along (please no, though)