mobilty Fantastic post, really appreciate the detail thank you.
I had been looking to find tips which were of the oblong shape and hadn’t considered putting on something with a round aperture, but after seeing your post I have taken some of the comply foam tips I have from various headphones. I am currently using a set which are designed for the Sony WF-1000XM4 which were my previous TW earphones (but now last about 20 minutes out of the case)
So far so good, my main goal was to increase the passive noise isolation with a better seal and the comply foam does this well by expanding into your ear canal. I’ll keep experimenting as I have 4 different sizes of tips I can try, I will share some photos as I do. Only issue so far, the medium sized ones only just fit inside the charging case.