Options for 3-square puck modules for unit origami

Options for puck origami units of three squares length.

None of these units require enantiomorphs when the phase shift is two squares. When shingled, the splice edges of the upper three designs can be hidden. The lower design, which has splice edges coinciding with the edges of the squares, cannot have all its splice edges strapped-down because the length of the unit is odd (see previous post.)