I'm not familiar with the Lokar setup, but on a normal setup you should always run two, even if you get different springs. If there's only one spring and it breaks, instant throttle!! Usually at the worse time.
Ok ill keep messing with them. I've tried combinations of springs my other ones didn't return the throttle all the way unfortunately. Well I'm not that familiar with it either. I wish I knew someone who was and I also wish I knew someone with a TF2 so I could feel their 1-2 shift. I have mine on "coffee spiller" mode and my 1-2 shift is weak as.... my 2-3 shift is definitely coffee spiller though.