has anyone put in a pro package with the stock hammer? Was it any good? Or will the Cajun race hammer just make for a lighter single action trigger pull.
Like Earl mentioned, if the first one was a CZ SP01 shadow from CZ custom then it likely came with a CZ custom competition hammer.
Not completely the same, but I recently installed 3 standard manual safety SP01’s with CGW’s complete spring kit + firing pin + floating trigger pin with some polishing. I was super happy with the results even with the stock trigger and hammer. So I would recommend trying that first if you are looking to save money, plus the install will be far easier without having to worry about removing and reinstalling the hammer pins. Since the CZC SP01 Shadow does not have a FPB (to my knowledge) your results will likely be better.
The CGW trigger, hammer, and sear will mostly affect the reset, trigger reach, and trigger break while the springs and polishing will get you the most trigger pull weight reduction, in my understanding.