We added ballast the same way at first to see how much of a difference it made. I went to lowes and bought 300lbs of sand for around 20 bucks and played around with the weight and locations of it, then I went to ebay and found (2) 350lb fat sacs for 35 bucks new in box...(I lucked out I think). The sand is a good and cheap way to test out adding weight, plus lowes has a 90 day return policy for that. I wrapped my sandbags in 55 gallon trash bags and taped it up so I didn't rip the sand bags