I decided to add a 5th cell to my skyline but i wanted to do it a little different. I cut out the space behind the clip that holds the body down.
I had to cut out the center bumper mount at the rear and the extra platic that is in the center. This alows you to put in the light kit with less interference. Another cool side efect is the extra weight at the back improves the traction of the back tires and over all stability.