Home Forums Hunting & Shooting Gunsmithing Swapping out for a "Ernie the gunsmith" trigger pull spring.

I am about to replace the factory spring with the lighter varmint spring (1 1/2 - 2 1/2lbs). It is the xmark pro (non adjustable original model). I know the lower front screw (1/16" Allen head) is the trigger weight adjustment screw, but my question is....do I just remove the screw all the way and the original spring will come out or do I need some special tool to get the original spring out and the new one in? I am not tinkering with the sear or the over travel screws as these are already tuned very nicely. Thanks for any input. John