Whenever working on my new theories (z 289), I review my old to see if there are any clues.
I made a recount nullifying all alphabetic symbol the Z408 and Z340 symbols using webtoy in the site of Mr Doranchak .
To my surprise ...
There are a total of 408 non-alphabetic symbols and 340 alphabetic symbols,That is, the same length as each separate ciphers.
I believe it is not coincidence. There must be some meaning to it.
symbos in Z 340 / Z 408
Z 340 = 142 ALPHA 198 not Alpha
z 408 = 198 ALPHA 210 not Alpha
See image below.
in this case the Letter I
are written differently, but within the standard used in any language
I Letter in Wikipedia