Hi guys , I am going to need to change my sound system in my r34 gtr , I will try and put a picture up of the current set up but there is what looks like an original CD player at the top which is linked to the mdf . Underneath is the heater /air con control unit . Followed by a single din CD player . Most set ups I've seen show the heater unit at the top and then a double din system underneath . Can anyone advise me on best way of changing what I have ? Thanks in advance for any help .