It has been my experience that Koni is really responsive to email or even Facebook inquiries. I had a few questions when I installed my Konis on my Tiffin, and they were really helpful, much to my surprise.
Sorry I couldn't answer your question directly! GOOD LUCK!
Full -Time On The Road
2008 Tiffin Allegro Open Road 35QBA
6.7L Cummins ISB Tuned to 300HP