I 'm looking into getting a Cooler Master ATCS 840 case but I can't find how far apart the feet on the bottom of the case are apart (the place I have my Silverstone Temjin TJ03B case sitting) is only 21 inch's wide....so if anyone has a ATCS 840 could you please measure from the back of the back foot to the front of the front foot and let me know how many inches it is...I would really appreciate it and THANKS in advance!