For years, Rick has stated that the cheap rebuilds you find at the auto parts stores are no better than an old steering box. He said they are merely disassembled, cleaned and reassembled with new gaskets. He would go on to say that Firm Feel goes further, replacing hard parts, adding stiffer springs, etc.
It would be a hit to his credibility if these kits he offers is nothing but gaskets. Maybe you should email him to see what is in the kit.