I hope you two realize how inmature these discussions are.
Statements "I am doing the best zapper in the World", "I invent this and that" are really silly, since the zappers (no matter what schematic are using) are based on the same thing HK published in her books. Moreover lower frequency, super-duper stabilized wave and so on are NOT PROVED to work better (significantly, superior, etc) because NO ONE KNOWS HOW AND WHY (IF) THE ZAPPERS WORK. I never heard proven explanation and till now nor voltage, frequency and nothing else is explicitly shown as THE factor which is making the zapper to work.
Ken, for example, 100% duty cycle is impossible, because that means that there is NO frequency. Please, both of you, be more serious and stop blaming each other. You should be enough qualified to clear such statements as 100% Duty on your sites. You should be enough mature to not blame each other but to concentrate on your own work. No one is looking for comparison, people want absolute values!
You do not help to anyone and it is true - this discussion is not for this forum.