Installed my blue spring today. I must say that I noticed a definite improvement in throttle response. It was real easy and I wouldn't have even known the difference in springs if I didn't do the upgrade. When I installed it I skipped the step of taking of the secondary fuel filter housing cap and draining the fuel from it.. I unscrewed the side cover to get access to the spring, stuffed some rags under the housing and pulled the spring w/ brass cup and had some fuel leak out...not even enough to drain through the rags though. All in all took about 30-45 mins in the blazing Georgia heat. Very happy with the upgrade and the truck seems to run so much better. Thanks to all the guys who have done the write-ups because I read over them multiple times to make sure I had the process down pat.