I would be happy to help, if only to offer “moral support” in your endeavor to put together a simple walk-through, or if it’d be helpful, to also help source products that are already “in the stream” that would provide an easy way to mount, case and finish your project for other freaks. I know for myself, I am always far more inspire to finish projects like this when A.) I know other people have an interest, and B.) I have someone to bounce ideas off of and sort of “push one another” to develop the simplest, easiest and most cost-effective solutions.
Because USB can be daisy-chained, it’s even well within the realm of possibility to build a larger external enclosure that can house more than 1 optical drive, and even have the ability to mount OR dock an external hard disk (or disks). The questions are A.) Can you write to multiple CD/DVD/BD targets successfully via a single USB connection with USB 2.0? 3.0? You CAN write multiple targets with, as one example, Nero Burning Rom 6.xx, if the drives are the same successfully. I have even writing multiple copies simultaneously using different drives, although if the write strategies are markedly different, it will cause failures because they can not use the same data stream. (The data becomes asynchronous between the drives)
I am also aware that, at least where printers are concerned, connecting more than two printers to a single (USB 2.0) hub causes weirdness when printing multiple jobs to multiple printers simultaneously - where the print jobs sometimes just “lock up,” and there’s no real rhyme or reason to when this will happen. I mention this because I’m not sure you’d run into the same problem with optical drives daisy-chained.
Hmmmm . . . I’m afraid I (sorta) went slightly off topic here. Sorry Anniyan.
We will now return you to your regularly scheduled thread topic, already in progress