Cube puzzle (x6), create 6 small cubes or combine 4 pieces of each set for 1 big cube

Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:4504671.

As a kid I had a set of 6 foam cube puzzles. Combining 4 pieces of each set creates a big cube. Using photo's and with help of google Images, I managed to recreate all 6 puzzles.

From photo using google to 2d pixel art design to SVG, import into OpenSCAD, extrude and "reduce" with offset() to create a little tolerance, I managed to get a puzzle that fits tightly in it's storage frame and tightly enough to create the small cubes.

As I am still in the process of printing them all, I have yet to find out if the tolerance is tight enough to create the big cube.

Disclaimers.

1. I created this because of hobby reasons, wether or not I am capable of doing this.
2. I did NOT check if there already is a set like this on the web. If there is; it is purely coincidental, I did NOT copy nor remix your work.
3. I do NOT know it these puzzles are copyrighted, I created them identical to the puzzles I played with 35 years ago, though they are smaller in size, the shapes are identical. If anyone has a problem with me posting these puzzle here, please let me know, and I will remove them.

Source files are terrible at this time, so they are not included. If anyone wants the source files, I can arrange that :)

Important notes;

1. I eye-balled the tolerances and they turned out nearly perfect. I want to change the tolerance of the puzzle pieces a little tighter, and the storage frame a little less tight to compensate, but my skills are limited.
2. I printed these on my Ender 3 and Ender 5 in .2 resolution and my printers and set-up are fantastic (yes, I am proud of that, but they are far from perfect) so the tolerances might work for me, they might not for you. I apologies in advance, please don't get angry if the print fails :)
3. the color in the file names identify the color of the original puzzle. I would suggest printing the puzzles in different colors as the small cubes are a single color and the big cube has 2 solutions; one mixed color, and one with a single color on each side. These colors, obviously, do not have to be the indicated color. (as you will see in the pictures I am preparing)

I will add photo's when I have printed and assembled it all.