You have measured your car, right? To see if your box fits, right? I must have measured my car a dozen times and I was so close to getting my box in. But car ceilings are not uniform and those little bumps hiding equipment on the ceiling can stop a box cold. So, taking it out and cutting it down, a job that will take all day. Don’t be me: try putting your box in the car now rather than just measuring. You won’t be up all night, like me, trying to cut it down.