Have a KA840 Ohlins shock on the Ninja 300, it's a 46 x 160 spring, 80N/mm. Apparently Ohlins doesn't have other options for this shock, but I'd like to get a stiffer spring. Before I go take a 100 measurements and look for a custom spring, does anyone have experience with these and knows another spring that fits? T-Man says he doesn't do these shocks much.