@Rentlix: I know what you mean but I have good reasons to use 3x3x3s:
1. To demonstrate the truncating technique and finish the series every hexahedral puzzle is as good as the others.
2. 3x3x3s are easy to modify. Try some of the extended-truncated-mods with a hexaminx!
3. I have a lot of them. See the next point.
4. I pay an average of 3EUR for each and they are good quality with occasionally bad stickers.
Also, with the 6th one, isn't the top layer's stickering a bit trivial?
Not that trivial. Two edges have no orientation and are identical. The other two edges are "normal". The 4 corners have visible orientation and two pairs of two are identical.
OctagonalEdges E8A00145003.JPG [ 262.4 KiB | Viewed 1072 times ]
Can't wait to see some the extended puzzles
No. No extended puzzles for these. After I analysed all possible variants with OctagonalEdges with some degree of symmetry I came analysed them for their potential to result in interesting extended version. These 12 fell of the list afterwards. But you can see one variant here:viewtopic.php?f=4&t=17655
which was funnily not made by me.