Trust me follow those instructions and you'll have a great trigger on your gun.
I took the gun to my gunsmith to check trigger pull readings before and after. The original trigger values with factory springs were 11 lbs double action and 5 lbs single action.
I put in the 9 lb hammer spring at first and got a few misfires. Went to the 10 lb spring and will be checking it out today, but I suspect it'll be fine. Took it back to the gunsmith and we got readings of 9.5 lbs double action and 3.5 lbs single action. The trigger feels really nice, I agree with your "great trigger" comment!