I am not sure if this helps a bit, but I just got an a 1200 form AmigaKit with an Indivision installed. They did not use the Hard drive sled, but mounted the hard drive right to the "lip" of the case. The Cable needed is that which has been "stipped or broken" and they glue a small piece of plastic on the indivision itself, where the hard drive might touch it.
All in all it is quite a tidy and neat mod, which I am going to try on my A600. It's just 2 small screw holes to put into the case. There are mor pictures on my blog.
