Well, I finally built my sand bag (as shown on Rosstraining). Being the super shopper (aka cheapskate)that I am, I used my seabag from USMC bootcamp, got free sand from a buddy at work (had it in the back of his truck for traction), and only had to buy some contractor trash bags and twine. It cost me $16, Ross would be proud! On Ross's site there are instrucions for building the bag. He originally used zip lock bags sealed with duct tape, but also has instructions for using contractor trash bags. I went with the trash bags to save time. I filled six bags with 20lbs of sand, tied them off real good, and them double bagged them all. Then I just plopped them all in my seabag. It almost filled it up, I could use another 20lb bag of sand, but a 140lb bag is a bit extreme right now. This thing is an *** kicker!!! 120 pounds doesn't sound like much, but it is hella hard to get a grip on this thing. Plus the issues I'm having with my hands don't help. I haven't really done much with it yet though. Ross does a lot of shouldering the bag and presses, but I do plenty of lifting at the gym. So I just planned on trying to carry it up and down my driveway, which is about 200ft long. I sense some pain in the future! Oh, and as a huge bonus, I also got my hands on an empty beer keg this weekend. I'm gonna fill (or half fill) that bad boy with sand too. This is gonna be great! Hopefully I don't over do it, I've got so much stuff planned.