M, if different people start asking for different configurations of the CD-ROM, then it will become more difficult to manage administratively. If there is only one choice, then the person who is managing this huge task won't have to keep track of who wants what.
The auto guys don't have to go into the MT section, and vice versa for the MT guys. You aren't going to save that much anyways. You are talking about less than $50 for the whole thing.