Start with the dagger trigger and do this
25 cent trigger jobI would add to polish the safety plunger completely inside and out and inside the hole in the slide it is in
(I did this on a CZ52 and it helped a lot to smooth the trigger)
I used a dremmel with the polish tips. They look like rubber and have polishing compound in the rubber and are quick to put a Crome shine on steel
Practice on some scrap steel to get a feel for these if you have never used them before