I have not, but am going to soon. They still look great though, after some NASTY launches on slicks with the stock arms as well as these. I have a friend who is going to weld my axle tubes up for me, and he is going to weld in these battle box reinforcements in at the same time. I gotta say though, these things are NOISY!!!! They squeak a TON. I've greased them a few times, but nothing seems to stop the noise. In my last set of pictures, the car is actually riding on bone stock fox body springs, with the perches about 3/4 of the way down. I haven't launched on this setup yet, but it rides a hell of a lot better than the last set.