I created a fully printed mirror cube. The mechanism is designed to work with the printable core and m3 screws. Some centerpieces are too shallow to take springs, so for those, I just tightened the screws until the piece would spin freely but not wobble. For the deeper pieces, I used 0.5x5x10mm springs which I found on amazon. 

There are two versions of the puzzle: asymmetric bump and symmetric bump. The asymmetric bump means that each face has been extended by a unique amount, meaning that the solving process is more straightforward. The symmetric version means that every face has been offset by the same amount, so you might run into parity when trying to solve it! The symmetric version is the stickered one in the pictures, I'm too lazy to make a sticker template for the asymmetric version. 

I included a view of the parts oriented in the slicer to show how I printed them. Now that PrusaSlic3r has the ability to add brim to specific objects, you could print them all in one batch if you wanted to. BE SURE TO BRIM THE CORNERS, others wise they might not stick down very well.

Be sure to sand away any sharp edges or warping artifacts before using. A thick speed cube lubricant is also recommended to get it turning silky smooth!

As of right now my Thingiverse isn't linked, but my username over there is Kawagishi, so you can find the original release on there if you wanted to.  Since this was originally posted on Thingiverse, I'm not sure if anyone has released a similar puzzle on Prusa Printers already. As a disclaimer, this is entirely my work and I am not ripping anyone off.