Is there a thank-you-Philippe-button here? 
Again I would to use ++ there: Thank you again, Philippe! 
I played around and ended with your configuration and segSize=25% (I hope i did nothing wrong with that?), this seems to be nice even in the "corner-like" splines. Additionally, 4 sub-models (invented for the HQ-paths) are not needed any more, and I beautified a sub-models file name. So attached is the updated version based on Philippes suggestions.
Again I would to use ++ there: Thank you again, Philippe! I played around and ended with your configuration and segSize=25% (I hope i did nothing wrong with that?), this seems to be nice even in the "corner-like" splines. Additionally, 4 sub-models (invented for the HQ-paths) are not needed any more, and I beautified a sub-models file name. So attached is the updated version based on Philippes suggestions.