I replaced the stock spings with the same type, but manufactured by Cylinder & Slide. I've found the factory springs to be a bit soft in their heat treatment. I did have to adjust the tension on the C&S springs to increase the trigger weight to where I was comfortable with it on a carry gun.

 

The C&S Light Pull Sear Springs are the way to go! 👍

I’ve never needed to “unlighten” one myself; but I’m 40+ years used to light 1911 trigger pulls.

 

Steve in Allentown has a sticky on fitting a sear spring in the gunsmith section of this forum. It will tell you what you need to do to fit it correctly.

 

Oddly enough, The spring I tried in my Springfield Armory 1911 was also a Cylinder & Slide spring. Unlike you, I don't know how to adjust them so I just got a standard Wolff spring to replace it. I'm glad to know that someone else found the trigger pull to be overly light.

 

Any of the sear springs can be adjusted for any trigger pull weight. The difference with the lighter springs with the relieved tines is that the tension increases more gradually as the trigger is pulled. There is less "stacking" as the sear tine comes into effect.

The sear springs are more or less pre-bent into shape as supplied. So the relieved tine springs will typically be lighter if no adjustment is made to them.

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The C&S springs are garunteed to drop the trigger weight by 1.5 pounds. I used them because I had them on hand in the parts box. On both of my Tisas that took the trigger down to below 2.5 pounds. Regardless of how many decades of light trigger pulls I may have under my belt 😳, below 2.5 pounds is too light for a carry gun, and these are working guns not range toys. I adjusted the springs for a 3.5-3.75 pull which is much better for that use.