I once had a Gold Cup with a sear spring, and replaced the sear with a Chip McCormick sear and threw the danged spring out (far out). (In fact, so far I never even thought about looking for it again). (I think I even ran over it with the lawnmower).
Just thought I would throw that in, in the event you ever decide you get tired of messing with that teeny, tiny, uncooperative and non-compliant spring. Just a thought. Mikey.