Thank you Professor!!!!! I tackled my gritty stiff trigger on my SP-01today, following your photos. I don't think I would have tried it without. I did the CGW Self Defense firing pin/spring set and am very happy. DA is down to 7 1/2# and SA is 4 1/2#. It still had a long pull (using the stock hammer) but only the spring pressure is felt now.
Thanks again,
Richard