Double WeirdTwo samples of Weird Disk 6x6 glued by design onto each other.
Dual CircleDual Circle - surprisingly enough is two interlocking circles - pieces move when the circles are turned.
Dual716 tiles moved by two plungers. A custom made puzzle similar to Tri-Trick.
DuplexAn intersecting circle puzzle, but with a twist!
Duplex 2Two intersecting circles of which one can be twisted.
EightTwo intersecting circles similar to the Lotica but of different size.
Elemental(Beryllium-10)The third member of the series of Elementals. This time there are 4 plungers of which 2 are side by side.
Elemental(Neon)The first element in a whole series of puzzles working with plunger under- and overlapping each other.
Elemental(Scandium)An Elemental(Fluorine) enhanced but splitting the plunger and thereby adding twelve triangles.