In my long quest for the perfect fit I have try all Comply, with and without the cerumen filter, both alter the sound and it's very noticeable for me, this is due to the small holes in the material, they are fine for comfort and isolation, to solve fit issues also, finaly we have all different ears :)
I sincerely doubt that.
How the TS500 fits:
The red hole is actually how small the sound bore is.
The TS500 squished before insertion
A sideways view of the TS500.
I used foam with the SD3 because of it's vacuum sealed design that can be quite painful after a long time.It creates actual suction in my ear canal, which is very unpleasant. Foams seal without the sucking action, which actually improves SQ because your tympanic membrane is allowed to vibrate more freely.