Fill without rotation

[donkirkby]

I think the connecting tabs can be bigger if the pieces don't need rotational symmetry.

See if packing can work without rotation.
See if a set of 4 or 5 different sizes can add up evenly with each puzzle on a single side.

[donkirkby]

One possible combination of sizes is 7x7 (40), 11x11 (92), and 13x13 (136) on one side, with 9x9 (68) and 15x15 (188) on the other with 3 unused tiles.
If we don't need the 7x7 puzzle, then 9x9 (68) and 15x15 (180) can be on one side, with 11x11 (104) and 13x13 (144) can be on the other side.
To get a perfect set that includes 7x7 we'd need a lot of black squares: 7x7 (40), 11x11 (88), and 13x13 (128) on one side, with 9x9 (68) and 15x15 (188) on the other.

[donkirkby]

Make a demo pair of 7x7 puzzles, then sets of 9x9 to 15x15, as well as pairs at each size.

[donkirkby]

In addition to having bigger connecting tabs, font alignment will be more consistent without rotation.