Really curious to know how this would interact with a 2019 Fox 36 Grip 2 29'er fork at 170mm that has a DSD Runt installed.
I actually removed the LuftKappe in my fork to run the Runt which was definitely a trade off. I lost some small bump sensitivity but gained gobs more mid stroke support. On steep, tight, rough downhill tech where you are hitting things with the brakes on the DSD Runt is a game changer for an air sprung fork. Since the fork stays higher in its travel there is still a lot more compliance / travel available in these conditions, hugely enhancing the controllability of repeated big hits and compressions. It also helps by reducing fork dive while hammering on the pedals and while pumping through rollers. It provides a generally racier, more efficient but rougher and less planted feel. Where the DSD Runt is not so good is on high speed, less steep but still rough terrain where you don't need to brake. Here it can really beat your hands up and feels jittery and lacking traction because the fork is 'less willing' to get out of the way of fast small and medium sized hits and just tends to bounce off things.
I'm always wanting to have my cake and eat it too, but am I asking to much to hope that combining Secus with my Runt will give me the best of both worlds???