Just recently I've had a couple customers that have been upset by the fact that we won't allow a free hanging weight on vertical blinds like in the past.  The reason for this is that Federal Law has told us this is illegal due to children and pets getting caught in the cord loops and choking.  We are mandated to fasten all cords to the wall with a tension pulley.  I know this may be an inconvenience for some, but we're not going do disobey Federal Law and open ourselves up to a lawsuit.  Having said that, it's your house, you can do whatever you want to your blinds, but when we install them, they're going to be attached to the wall.  Thank you for your understanding.  Happy New Year!