Gamcube Cubetwist Oskar Gear 5x5x5 Cube Puzzle White

This thing is absolutely useless. When you turn a side, some of the smaller gears miss turns and the layer slowly begins to get misaligned. The small gear edge pieces are bad for that. The more you loosen it, the more the gears miss turns. Even tightening it to the max doesn't prevent the gear from missing. I took it apart, sanded down the centre pieces, put it larger screws and put it back together in hopes that making it super tight would help. I can barely turn it because it so tight, but gears STILL manage to get screwed up.To scramble this cube, simply make 1 turn, undo the turn, and gears will magically be f****ed up.I threw it out.