Looking at the chart it looks like if you use the stock brown spring along with the orange spring the advance will start coming in at approx. 1200 (vs. 1100 for the stock springs) and the rate of advance is a little slower than it is with the stock springs, although the total will max out about the same time (approx. 2700-2800). It's not a big difference but is slower. I could use the purple spring you take out. If you'd want to trade I could send you my orange spring and when you replace your purple spring with it you could send it to me (providing the orange spring does what you want it to do). Let me know what you think.