Infinity Kappa 9.2i crossover upgrade

The Kappas 9.2i are wonderful speakers, but from 95' and starting to get old.
So I want to give them some love!

About upgrading the crossover or replacing capacitors. Have any of you done this before? Can you provide me with some guidance?

Thanks
 
I guess you are not thinking about redesigning the crossover, but you want to check that it is working properly? Have you measured the parts to see that they have the right values.. values can change over time with some components, or when they are damaged.