Hi there, it's Bill Dane from FFmetal.com. I hope you're doing well. Over the past several months, I've had to turn away business because my battery box won't work with some of the newer 2015 IRS setups. FFR changed their design sometime in early 2017 and added a bar above the center sections that blocks the battery box installation.
Is that area of your car still accessible? Is the trunk aluminum riveted yet? If not, I'd like to come down and take a bunch of measurements to design a new box.