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For the decocker models, you use the factory sear, and as far as I know, no adjustment needed as there isn't a safety involved.
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This is true. I just tore apart my sp01 tactical this week, polished the sear cage and trigger bar.
Getting the sear back together was a PITA, luckily I bought the slave pin from CGW and some tweezers/dental picks from amazon that made the job a breeze. The two springs inside the sear itself were easy, for me the trouble was the FPB lifter spring, and then wrapping the little leg of the decocker spring underneath the decocker levers foot.
Gonna go shoot it in about 2 hours, drastically reduced the SA pull and I could care less about the DA pull since its a range gun only and I pull the hammer back before I start shooting anyway.
My 0.2c for mandatory upgrades are the extended firing pin, reduced power firing pin spring, roll pin for infinite dry firing, and a <15lb mainspring (required with the firing pin per CGW)