Yes I have adjusted the settings from stock but the problem is that springs are really made for lighter riders (160-170 lbs) and the roads here are very potholed. Even dramatically increasing preload, etc does not prevent significant bottoming out, especially over frost heaves. I installed Ohlins front and back on my BMW a few years ago and ensured that the springs matched my weight and riding style and the improvement was dramatic compared to stock, even after constant fiddling with the stock set-up