Links D - Lucie Pauwels by Pelikan

This puzzle jumped out at me as I've always liked designs that appear to have cubes trapped in a surrounding framework, similar to 'Barb's Cube'!

Here's what Lucie wrote about this puzzle design:

“Links D puzzle is part of a series of puzzles where 2 or more pieces are connected and cannot be taken apart but allow some movement, this movement is needed to assemble & dissamble the puzzle. The shape of this puzzle is based on 2 square ‘links’, and 2 cubes that fill up the links.”