I just recently shipped a kfactor super six pack and I'm worried it might it returned back to me. I used two medium usps flat rate boxes, I had to really stuff it in there. Also I checked the usps tracking and can only see the 2nd items I shipped(shipped 3 racquets and a bag, but had to put them in 2 different boxes) which were the racquets the not the 1st which was the bag. I checked and it said "Delivery status information is not available for your item via this web site. A return receipt after mailing may be available through your local Post Office". Is there anyone who have done the same without any problems, like getting your stuff returned?