Rubik's 2x2x2 hollow skeleton

A time before I have found photos of "minimal hexagon and heptagon" puzzles. I wanted to see how it works and start a series with a "triangle" puzzle. Because of problems I have stopped this project and will mark it as "failed project". I will share my experience with you

1. Photos of coloured thing:
There is a unsymmetric dovetail connection between the elements. When move, it moves very good. There are not all the moves possible, so it is not a good puzzle.

2. Photos of brown plastic t