Wow. You literally jumped straight into the deep end.
I confess to more than a little nervousness in this process
Unfortunately, I have never been able to find any IEM/tip combo that even remotely worked for me. When I got my impressions, the tech commented on the unusual shape/size of my ear canals, so I take that as root cause. I'm at an age where it is use it or lose it time for my hearing, so I really wanted a TOTL audio experience when on the move without looking like a dufus. It was a leap of faith, but I had faith.
Thankfully, the fit is impeccable. I'm delighted, and eager to be able to enjoy that no compromise music experience in so many other parts of my life (thanks @FullCircIe and team!)