The reason why I changed the standard stacker was that I had a very good Sony Head Unit, and Sony Stacker at the time.
I was surfing the web, and found the clarion in-dash T.V.
The T.V. could connect up to the Sony deck, by using a Sony Bus multi link adaptor.
Anyway, that meant that the Premium deck had to go, and the Sony and Clarion were fitted in its place.
The Ford FMT/Alpine stacker could not be connected to the Sony head unit, because there would have been no way to control it. (I.E. the Sony Bus would not talk to a FMT/Alpine Bus).
The standard stacker bracket was modified to fit the Sony stacker.
The standard brackets for the sony stacker were not suitable, because of the lip in the boot, I.E. the stacker would have sat too far up inside the boot, and would have been a pain to get the magazine in and out.
As for selling the CD Stacker, I would prefer to sell the Stacker and the Premium Sound Deck together, as a Premium sound system without a stacker is of little use.
Also, its a big pain to remove the standard Stacker wiring from the vehicle, as the seats and carpets need to be removed, to properly get the cable out without damaging it.
Hope this helps