Hi i have just bought a Amiga 500 + and it works really well ,i was wondering where i would get a SCSI HDD controller ,so as to use a cd rom like the guy on youtube ,i am not really sure what a SCSI HDD controller is or what it actualy does ,apart from control the Hdd ,also how much upgrading can i do on this model Amiga ,i already have two Amiga 1200,s which need a little work on them ,but i am really impressed at how good the games look on the Amiga 500 + and how quick it is ,as i dont think theres been any work or upgrade done on it ,any help please .