[TCMJ1816]

We came up with a fairly ingenious solution this year for ballast, we are using a 1" threaded rod the length of our back tube and we increment nuts on until we have our desired weight. Each 1" nut wights about 1/4 Pound which gives us all the variability we need. Another plus you touched on is its all COTS and fairly cheap (we found the nuts for under a dollar per and the rod was about $20)