When my back ached, due to all the extra weight in the front, I took a fanny-pack and filled it with rolls of quarters, and wore that in back. Kind of a counterbalance.
It was quick, low-tech, I already had the fanny-pack, and I was able to spend the money afterwards.
:thumbup:
If you're able to reduce the ache during the day, you might be able to sleep better at night.