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Is there a postprocessing program you recommend?
Actually I don´t know any...
Although, I have plenty of projects, that would need one )
But with an excel sheet and some expert knowledge it should be possible to write your own tailormade script. In the end it is ASCII-string manipulation with a little math.
Cura is OpenSource, and already has two postprocessing routines implemented. It could work, too.
-Olaf