RE: Titan Ballast Box in Post #26.
If you cost your vehicle travel at 60 cents per mile for a car and 75 cents per mile for a truck, I do not see how you could build a ballast box much cheaper than the $259 Titan price, unless freight is high. Running about to assemble the materials would run up some miles.
It's Free shipping too! I would really prefer a more compact version, but bang for the buck this is hard to beat!