Got a car with the G8 Designs/Folick stereo setup. Does installing this require cutting/splicing? Or is the function achieved via jumper harnesses or the like. I like the radio setup but positively hate the HVAC setup. It works fine I just find myself unable to get comfortable with how low in the dash the screen is as well as the concept of touch screen controls. The reason for my inquiry is I would like to remove it and put the stock radio/HVAC back in. I have struggled to find install instructions which I'm sure would answer this question, hence why I'm asking.