Designed by Markku Vesala, made by Eric Fuller 2016.
(Purpleheart with nylon dowels, 3 inches square)

Here is what the puzzle maker said:

"The 3x3x3 cube is pretty played out. With only 27 units there are only so many things you can do with it. That's assuming tradition block glued to blocks...if you open up edge connections, a whole new world of complexity appears! Markku's excellent Liberal Cube makes good use of these dynamics, with a very confusing and difficult seven piece serial assembly. I would estimate that the difficulty is on par with Coffin's Convolution design which of course uses a 4x4x4 design format. This puzzle is a lot of fun and displays very well with the contrasting white dowels against the dark purpleheart."

Here are 6 photos (not to scale) of the puzzle coming apart: