Sliding puzzle with a QR code

Remix of https://www.prusaprinters.org/prints/29013-print-in-place-sliding-number-puzzle
QR code generated using https://printer.tools/qrcode2stl/

I printed a single-layer QR code on the print plate, before printing the 8-piece sliding puzzle on top in a different color. The QR code is fused into the puzzle design. You must unshuffle the puzzle before the QR code is readable.

QR codes can still be read even if a part of them is missing. However, the corners can't be missing, so in order for this to work, the puzzle print needs to have the empty space in the middle, not the corner. I have modified the puzzle STL to have the empty space in the middle. There is also a version with no numbers.

Print instructions

Print the QR code with 0.2 mm layer height first.
Then print the puzzle on top, preferably with a taller first layer, say 0.24 or 0.30 mm. This way the code print gets fused into the puzzle material.