I receive my SP01 Christmas eve, shot it two days later. Did change hammer spring to the blue spring from CGW, added a SS guide rod with a 14# recoil spring, everything else stock. Shot a 5 or 6 shot group at 25 yds, 2.5 to 3 inch. With MG 121gr, 4.0 TG powder @ 1090 fps.
Told myself...I could shoot this in a match, right now! No problem.
A nice trigger is good to have but yeah, its 300 dollars. And you need decent sights. It adds up. Just practice with what you have.
JMO