I have a long standing interest in the case. Like many here, I wouldn’t be surprised if Z turned out to be someone who is not on anyone’s radar. If I have to choose between existing theories, I vacillate between TK and TZ, that is Ted Kaczynski as Zodiac, or a Team Zodiac with Manalli as the writer. I will post more thoughts on Kaczysinski in the appropriate section.
I have been looking at the 340 on and off. I am currently exploring the possibility that it is a word search divided into 4 quadrants, perhaps with a progressive substitution from quadrant to quadrant. It is not looking good so far 
Looking forward to the discussions.
I sure missed some introductions! Good to have you here!
“…they may be dealing with one or more ersatz Zodiacs–other psychotics eager to get into the act, or perhaps even other murderers eager to lay their crimes at the real Zodiac’s doorstep.“ L.A. Times, 1969
