Sagging 67 needs your input

I'd also like to hear from someone who has added a leaf to help with sag. My original springs also have alot of sag, but I also have a second set of older springs that I can use to add to the pack. I have read on some sites that you can cut the eyes off the main spring from one set to double them up in the sagging set. Other sites recommend only adding one of the shorter springs to the pack. Yet others recommend doubling the main spring and adding a short spring. I suspect that I will at least need to double up the main spring becasue this is the one that seems to be affected the most, showing a bit of recurve.