My understanding is yes, it is absolutely okay. The salt is functioning as the electrolyte in the homemade hydration fluid. Keep in mind the R&M hydration is done while they are also being fed formula (after the first 12 hours or so - depending on the level of dehydration and emaciation).
I sent a PM offering assistance in getting the presentation in a format conducive to posting on our board...this way we can all see it.
I think it is in the works. I've been out of it since late yesterday afternoon...couple more tears left to cry then I'll pick up the pieces and follow up.