After my Jr RAMPS conversion Jr gained SO much but lost one major feature it had - enclosure.
So I've made a decision to restore my Jr to its "formal glory"
With this mod there's no way going back because you'll need to modify (cut) current LCD plastic mount and superglue new printed parts on.
Also if you want front facing SD card slot you'll need to do some soldering.
Alternatively if you're not ready to solder then please use front plate without SD card cutout, in this case you either need tiny fingers to get SD card in and out at the back or you can use one of those SD card extender cables to make it easier to reach.
I've added some work in progress photos which might help.
(I've used 3D pen to hold SD card reader in place but hot glue gun might work as well)
If you are interested I've also added super simple port plate so you can use existing PSU nicely. Again soldering might be necessary, I've simply reused/desoldered DC jack from the Arduino board and reused it in port plate. Switch I had in my component draw already.
Didn't bothered to trace USB cable hence all prints I did was from the SD card.