Dear Andy,
I have EDS Vascular/Classical with MCTD (Raynaud's, Sjorgrens, high ANAs). I have peripheral neuropathy that started about 8 months ago. My PC said it is because of the autoimmune problems. He basically said that it is what it is.
I also have tachy and have had it for about 7 years. I am on beta blockers for it (and the subsequent hbp) and as long as I don't carry things, bend down, etc, I am fine (LOL).
It is important to keep pushing the water and salt. Your body will eventually slow down on the bathroom breaks when it gets used to the added water.

Karen