I have not been able to find Big Taco's tutorials for a trigger job on M&S models. Where are they? I really want to smooth out the creep and improve the mushy feeling. What is the difference between the pre-A1 trigger group and the A1? Are there any later parts I should get before I start? The disassembly video I watched was for the gun without the manual safety, which mine has. Does this affect the disassembly? Any relevant info is appreciated.