I have an 09 450 with a z-star pro. Im recently getting more into cross training using more trials techniques. The z-star pro is great for the most part but I cannot modulate it much. It's more of an on and off kind of affair. At the end of the day i'm always at the mercy of how hard and or quickly the z-star pro is set up to engage. That is my problem at this point. Before I got the z-star pro the stock clutch pull was just to much for long hare and hounds with the miles of rocks, water falls, and down hills they put us threw. That is what triggered buying the z-star pro in the first place and it did in fact cure my arm pump problem. Now that my skills have progressed and I want to learn new things it is holding me back I feel. The way I see it I have two options. #1 From what I have found on the new Core manual with torq drive it is more resilient to experiencing fade and exhibits excellent modualtion and provides easier pull. Now that sounds like exactly what I want but at 900$ that is quite the plunge into darkness with the promise of light somewhere below. #2 Do the 06 clutch modification and install a Magura hydraulic clutch. This option from searching the internet provides great results and is more to the tune of 550$. I'm not ready to pull the trigger on either right this second but regardless it's a question I could use some opinions on..