Double Trouble A

Double Trouble A is a cuboid twisty puzzle out of a set of two, based on an idea by Bram Cohen. The two cuboid puzzles seem to have the same behavior at start.
-The green and blue faces turn freely
-The yellow and white faces are coupled to each other
-The red and orange faces are completely blocked.

A difference arises when one turns the coupled yellow and white by a quarter turn. Then
-in version A (this), the red and orange faces remain blocked and the green and blue faces can still turn freely, whereas
-in version B (buy here), the green and blue faces become locked and the red and orange faces can suddenly turn freely.

Watch the YouTube video.
Read at the Shapeways Forum.
Read more at the Twisty Puzzles Forum.

Please order a 3D-printed do-it-yourself puzzle kit from Shapeways at this page (check with Oskar about screws and stickers), or contact Oskar directly if you are interested in obtaining a fully colored, stickered and assembled sample of this puzzle.