I am replacing the rear shock on my 2002 Banshee Scream, I know the size of shock I need any everything, but I am not sure what shock to get because I heard that the 2002 frames are a little different then the later frames since in 2002 it was still the original design. I was looking at getting the roco, but I thought that I might need and internal resevoir or something. So any help would be appreciated. Thanks.