Hi there, I want to get a 4 Stand Equinox for my hi fi Kit. Im going to buy it from superfi.co.uk. However, theres only one little problem! Im a little confused about the "add on heights". What exactly do these mean? I can choose from "base unit only", 130mm and 180 mm Does this does make each shelf a different height? Im a bit confused.. Heres the kit that needs to go into it : Cambridge Audio Azur 640a amplifier Cambridge Audio Azur 640c cd player Project Debut Phono SB Turntable And leaving one shelf free for something else. Can anyone offer advice please?