It is best to search and follow the links posted in answer to your questions,before asking more, IMHO.

That said, here at the barracks, the only stupid question is the one that doesn't get asked, so let's all chill just a bit!

Haven't found a pic of the "Backpack" HDD enclosure for the Plus yet. In the first place, they're probably unobtanium, and if you did get your hands on one it's be blasphemous to hack it . . . but faking one up that'd be just deep enough might be an option worth looking into.

Interesting link:

http://www.gearfuse.com/diy-mac-classic-to-mac-mini-mod/#more-3490

Here's the link to my Classic Hack:

http://68kmla.org/forums/viewtopic.php?f=29&t=12737