Old leaf spring equalizers have me paranoid

I recently replaced all springs and equalizers on my 2 axle 5th wheel. I bought the ez-flex kits, new springs and all the hardware from a local Dexter supplier. I was able to do the work by myself on a Saturday. The instructions in the kit plus some internet research provided me with a step by step to doing the work. You'll need 2-3 jack stands and 2-3 floor jacks or combination of bottle jack and floor jacks. A second person would be helpful.

I was quoted $300 for labor. It was easier for me to do it because one of the old leaf springs was broken and I would have had to chain it up to drive 30 miles to get it repaired.