I cannot buy syringes with needles in the USA without a prescription from a Doctor. Besides, using the hand held syringe makes it difficult to accurately ramp up the flow rate. And, this must be done with 2 solutions, Silver and Salt. I did try a syringe with a plastic "needle" for backpressure, but I could not get the flow rate down low enough, nor hold it constant enough, nor ramp it well enough.

Believe me, using a syringe of some sort was one route I explored, along with several dummy water rehearsals to fine tune my technique using several methods.

Thats a bummer about the syringes. I never thought about them being illegal. In NH you only need to be 18 or 21 to buy them at rite aid. Pack of 20 was like 10$ or so. There was only one rite aid in the city I was at that sold them. It's amazing what you learn at art school

p.s. To the best of my knowledge, the main use for the needles were tattoos.