too loose

I have recently received a GAN 356 X. When I got to customizing, I put on the Purple Springs and put the Center Piece Travel to 0.6 on all of them. This should be the tightest setting. When I stretch the cube, it is tight. When I start solve however, it feels so loose. Even when I do the sexy...

I ordered a gold bump cube on amazon recently: http://www.amazon.com/Cubetwist-3x3x3-Golden-White-Mirror/dp/B006UWD80Q The reviews it has are both good ones. However my cubies are really loose and the cube locks up severely when trying to solve; like lock-ups so bad that cubies feel like...