Stop being analitical!

[Torsten]

I think that the only places where there is less space is when the text hits a drawing.

With less space I didn't mean that there is not enough space. My point is that the author writes k instead of t in a line since this way overlaps with other characters are less likely. This is therefore a layout question. 

There is no doubt that the character combinations where the characters would overlap are less likely within the VMS. For instance a gallow glyph following l is most likely a k or f and less likely a t or p.  An example for a word using lk is olkchedy and an example for a word using lp is olpchedy. For writing olpchedy extra care is needed to prevent an overlap between l and p. That glyph combinations like tk or lk are rarely used is one of the reasons why the Voynich script looks fluid when writing its "own language".