You got it, thats the one. It works very good and I use it on my son twice a month.
My son now become attached to it. He carry it with him all the time. It felt many time but the way you built it so rocket durable.
Thanks for this classic unit, ParaZapper.
Ek
added: One thing I'm very cautious was that people who has stroke should avoid salt or watch their salt intake. Salt can make their small tiny blood vessel at the brain become harden and break easily. To me, this is very serious. I would not advise stroke patient to add Sea Salt when zap using hand held rod.