I guess the density is in my head.  The stuff I make exibits a definite fast 
'drop' to halfway down the tumbler. It had to drop quickly when decanted from 
the half gallon 'generator jar' too!   There is a definite rubbery metallic 
taste at that halfway point.  Though the .9999 ingot was supposed to be what 
was rolled out, I am wondering if sterling might have been substituted.  The 
'bite' of the silver metallic taste in my first 'generator' a couple of years 
ago did not (if I remember correctly) exhibit the rubbery flavor (or possibly 
the drop downwards in the tumbler either). I am using 12 volts 'currently'...DC 
games transformer...no 'starter' and it runs about three hours in a half gallon 
with terminals about 2 inches apart (average).  Comments????   Other question: 
anyone have  a list of 'illegal' medical terms on colloid or zappers.???   Del