I’m new to this, but have been interested in the BallZinger. Got the materials…Zinc from McMaster and copper tubing from Home Depot. I’m using red and amber latex tubing from a medical pharmacy locally. I’ve made three BZs but only two are comfortable enough to wear. When I measure voltage (Radio Shack digital pocket vom) I get between .65 and .845v. I get the higher reading after I’ve been working or more damp in the crotch. I get good readings maybe because I am fully shaved, both cock and balls. I have not tried any variations yet such as filling the tubing with any solution. Don’t see any reason to as long as I get .7v to .8v. Has anyone been using the BZ long enough to see long term results? I am a pumper and regularly pump the balls for more blood flow and action there. I’ve always been high and tight in the balls, and am hoping the BZ will aid some growth in the region. Any comments?