Just so you know, I have always inspected my flex-a-form leafs for any possible fatigue/cracks, etc. The ONLY thing I've ever had to do is re-tighten the front spring-eye bolt, having installed urethane bushings (front and rear). When I originally had discussion with Flex-a-form about the durability of the fiberglass mono-leafs, they did tell me, then (late 1980s) that off-road dirt track cars were running their leafs w/o any problems. I've trailered the car for many years (~late 80s thru early 2000s), but raced it hard when on a track (mostly med-speed pylon autocross, and some hi-speed road course events)... and in the past ~3 years I've been driving it (easy/enjoyment!) on the roads/hwys and still no problems. IF you want weight reduction... consider the fiberglass mono-leafs, but i encourage the right choice/selection/design for your car's weight and your primary driving intentions.