I did that mod. It worked ok at first, but I later ran into problems.
There was some "bleed-thru" of whatever cd I would have playing in the cd changer. Not noticeable when my phone or tablet was playing audio, but you could hear it faintly in between tracks. I then burned a "blank" audio cd, which solved that problem, until the changer suddenly stopped recognizing the cd altogether. That stopped the aux input from working at all. I went back to regular cd's which the changer would play normally, but SOMEONE broke the screen on my dash-mounted tablet. When I tried to use one of the other tablets I have, I discovered that the broken one was the only device I own with a loud enough max volume worth using. Even my Samsung Note needs an inline amplifier on the 3.5mm line in order to have a decent volume level. The aux line is still hooked up, but I don't even bother to use it anymore. I'm planning on installing a double din Android unit with the climate controls moved down to where the cd changer is now. I'm just a bit apprehensive about cutting and modding the bezel.