You can either replace the spring with one that you mentioned(I've heard they're a great investment, but have not personal experience) or you can modify the existing spring. It takes all of 2 minutes to remove the spring from an A-bolt trigger and it's pretty self explanatory. Once you have it removed you can hold it in a pair of pliers(don't crush it!) and grind one end down with a Dremel or similar. I took about .100" off of both my A-bolts and at the lowest spring rate setting they are both about 1.5 pounds. You can always take more off, but you can't put it back, so yo might want to go just a little at a time and reassemble, check it out and then procede as necessary.