All the stuff that goes into the frame (trigger, trigger spring, sear, sear spring)

Removing the old trigger from the trigger bar was a breeze. Installing the new trigger onto the trigger bar was a major PITA. I don't own a bench vise nor do I own an Apex armorer's block (has cut-outs for trigger replacement) or one of the old aluminium trigger install blocks. I used a C-clamp, electrical tape to protect surfaces/finish, a punch, a hammer, and lots of salty language. The install pin on the new trigger is supposed to be slightly pre-set into the trigger slot so that the hole in the end of the trigger bar slightly mates with it. Unfortunately they only set the pin flush with the inside of the slot. In the end it worked out OK no damage works fine but damn.

Definite improvement over stock trigger/sear. I'm sure that when I install the two parts in the slide it'll be even better.

As far as using a C-clamp on the trigger bar, I did the same thing to a Glock I had years ago. It was easy getting the older trigger off but the installation was a pain. Keep us updated with your progress and don't forget the pics.