NOW I remember why I started over with a new enclosure box remix thingy... it had the ability to add a hex pattern to the top half of the shell and iirc the vent script was different, or the front panel was... 

So, I had a clue on where to change stuff to make the top load hole and how to mod the vents to make them go across (i think)

It was still a "learning" process because it was like the third time i'd ever opened an openscad in openscad.. still alot of dirty hacks that made the file unpublishable cause i'd change the sctipt and render and export an stl and then mod it again for the next stl file... Think I spent an entire two days figuring out why it was only rendering half one side of the vents and then leaving a notch on the last vent on the other side instead of centering the whole thing to leave a solid corner - but I eventually kinda figured it out.

I still need to get some stick on or screw on rubber feet for the stack in the pic but I spent the last of my money on an almond roll of that cursed filament I hate because it was 'close enough' to the real polymaker matte color that I think would have matched either the darker 400xl color or the 800/1050 color.

Side Note:

I saw that one episode of third rock from the sun where dick goes nutso on the computer with some old - uh - looks like apple or ibm xt stuff stacked with the old ass scsi cables everywhere... and now I kinda wanna do one where it's the old steel box drive style - and do a 'base' where it's a usb hub with some magic inside to adapt the usb to work over either 5 pins of the old flat mobo cables for floppy or the 40/80 pin pata hdd cabels daisy chained between the retrocart drrives - which I figured would be easier to find than going full nerd and using full blown scsi cables --- or parallel printer cables.. something beefy and chunky and totally impractical and a pain to manage LIKE THE GOOD OL' DAYS /sigh

To Do Doo's :

I still want to add a bevel to the openings of the cart slot so they slide into place with my sloppy and clumsy hand movements. 

i'd like a solid front and back where the vents continue across the beveled top edge like the atari floppy drives

The rear of the atari drives have different vent styles that are deeper/taller.

The bottom of the drive needs an entire redesign cause the atari style has a second level bevelled out - take a look at an atari tape or floppy drive and you'll see what I mean.. i'm not good at explaining visual details like this. 

The top and bottom shell seam needs redesign along with screw positions relocated to bottom into the top rather than the sides like it is now.

Make the openscad useable and publishable so things like the length and height of the drive can be customized to taste - so if you want a full 5 1/4 drive wasting space and filament you can