You're snapping one part into another. I'm not denying it might have an extra step or two, or take a different direction, I'm saying figuring out how it's done cannot possibly be this hard, especially if you removed it yourself and the COG is made specifically to be interchangeable in frames.There are plenty of videos and instructions out there for the COG removal and installation. However, there are none for a COG with the manual safety. I don’t know if installation is different with the manual safety, but this is the 2nd person I’ve seen who has had trouble with installation of the COG with manual safety. And if SA is saying it is difficult, nothing wrong with getting their help. Better than doing something to screw it up. I’m willing to give the OP the benefit of the doubt on this one. Especially since he’s dealing with a deadly weapon. You don’t want to make a mistake with it.
This entire discussion has gone to absurdity. The expectation is that to change grip frames on a gun designed to change grip frames should require sending to the manufacturer each time?
If that's the case, every gun is interchangeable.