I much prefer a flat face trigger and would like to replace my Glock's stock trigger. My primary concern is preserving the OEM safety systems, while getting a flat facing trigger shoe. Of the various after-market solutions, I'm looking at the APEX trigger

Should I just swap out the trigger shoe itself and call it a day?
APEX trigger shoe with OEM bar, etc.
Or: https://store.apextactical.com/WebDi...Details/192369