Hmm, lower air spring shaft from single position is narrower than the dual-position one, so the mix and match does not work. The only way to achieve this is by building a custom dual position 10mm longer shaft or a custom spacer with the custom longer bottom screw/bolt.
As Tim mentioned before...
for posterity purposes perhaps, hopefully will help someone else. My search engine results pointed here. It would be a shame not to answer such a simple question.
In my case I needed a 10mm longer thread for some experimentation
Hmm, note sure.
Can I keep my current lower air spring shaft(from the current 190mm) and mix it with the new upper airspring shaft from the dual-position spring kit 11.4018.103.012 ?
Perhaps I don't even need the longer bottom bolt and 10mm spacer.
That is the unknown, the gain here would be...
I would love to have the same option for the 190mm but it seems it's not available. :(
But that makes me wonder... if I could fit the dual-position spring kit 11.4018.103.012 inside my 190mm body and add an custom spacer at the bottom of the lower air spring shaft with a longer Bottom bolt...