I initially tried to "section" the cipher using indicators found in the ciphertext, example below:
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Then I decided To use the small dots To create individual lines of cipher text, which I then formed into even boxes. So I would take the cipher text and write it in a straight line, the line would stop at the "." , I would then take this line and create an even box with the text. By this means you get several individual boxes, much like the cipher that was split into 3 sections.
( the dots have red circles around them ignore the "luv" and "li" in red dashed lines, those were placed there for another project, and I did not want to attempt to remove them just for this quick post.
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Ultimately I did not get very far with these attempts, but I have made some incredible progress using another mean, I Will discuss all my actual cipher work when I am finished with it.
I also did something similar To what you have done by combining the three ciphers into a single sheet, then dividing the z340 by the same dimensions.