thx guys for the answers
findings:
* epub's conversion messes dark courier's implementation, it's not anymore monospaced or even the same font..
* inserting a non ascii character through HEX editor makes it no longer treated as TXT and dark courier (monospace) is lost.
i tried inserting a '*' at the start of every line (notepad++ rows mode) but didn't work,
thx davidfor for the hint on merged spaced you were right i made several test to find that,
more than two spaces are merged into one (no matter their position in the text),
so,
i replaced every 2 spaces ( ) with (` ) special ascii caracter decimal code 60 AND 1 space.. (notepad++ replacing function)
it looks now perfectly aligned
i am satisfied with how it looks even if it looks rainy
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still got some "???" caracters i would like to know if there are more tested monospaced/fixed width font on the kobo
i will be AFK please feel free to answer thx in advance..