Anybody ever added an add-a-leaf to a trailer?

Single axle under a ranger rb190. Boat is 19'10". Tandem was not an option on this boat, but probably should have been.

I tow it to the coast several times a year. New Orleans has some terrible roads. On the worst of the bumps, occasionally the trailer tires rub the inside of the wheel well.

Trailer is only about a year old, so the factory springs are not wore out..... just slightly insufficient.