Not to totally butt in, I gave this a shot a while back as well.
I think one of the key aspects in mocking this up is to make us of sul G patches. My rendition uses only the Dimension Strings, which is about 2/5 this size needed for this symphony. It also falls short in transitions from note to note. Once I have my Synchron strings updated with 2nds/violas legato, I may revisit and fix!
The transitions between the notes I think is very important, as is follow the score (the accents and bowing needs to be applied to the mockup).
"lang gezogen"... drawn out... MOLTO expressivo... if our Vienna Instruments player is in fact an instrument, we should be riding those CC faders HARD through a piece from Mahler -- a composer who does intense soft, intense loud, intense everything. "stets großer Ton" ....or if there is movement against held note, bring out the movement! "lang gezogen!" haha You must read at least 4 languages!
Here is a cheat sheet:
https://quizlet.com/41089925/mahler-9-german-terms-flash-cards/