Hi guys: I have a question about something I'm thinking of doing. To make a long story short here are some bullet points: 1. I have a single din radio and I'm not changing to a double 2. I have a Zune and I'm not interested in getting an ipod 3. I know I'm going to void the warranty 4. I don't want to buy another radio With that being said, I have a new Pioneer radio that has a 3.5mm Aux on the front of the unit. Unknown to me, Pioneer changed how their IP-Bus connector works so my current setup won't work with the new deck. I want to add another 3.5mm input at the rear of the stereo and connect my mp3 player that way so I don't see any cables. Can I add - by soldering - a 3.5mm input to the radio? Either solder it to the back of the existing port and run the jack out the back? Or solder it right to the chip on the board that controls the Aux input? Is this do-able?