Hehe, but howadays there are slim-sized CD-R and CD-RW drives out there, so there won't be any trouble with the lack of space in the 5.25" bay area of the A4000 case anymore! ;-)
I'm sure that C= had this in mind when designing it. By the time the CD-Rom becomes popular it will be something like ~2003 and then the users could fit in those smaller CD devices in the damn 5.25" bay! :-P