Pastapipo
500+ Head-Fier
The tips are proprietary but some here have successfully used Bose tips.
I am satisfied with the tips they come with. I just had to get used to them feeling loose due to their design. Once I stopped worrying I now just enjoy them and have stopped fiddling with them.
I actually struggle to use other TWS now because they don't feel as comfortable.
I too think the elite 10s sound fantastic, with a refined and balanced sound. The fit however was a reason to return therm. I missed the snug and secure fit which the Jabra T75 do offer. Also the passive noise cancellation of the T75 seem a bit better, which is a huge plus in the gym.
I was fiddling with the elite 10s more than I hoped for in search for a adequate fit. Now reading your comment, it makes me wonder if I have been too impatient with them and should give the elite 10s another chance. There are not a lot of alternative TWS which offer a discrete look, quality sound and physical button control.