Installing Angel Eyes on an E92/ E90 LCI is either one of two extremes, easy as pie or down right impossible.
The only thing setting the two extremes apart are the size of your digits. Big hands make this job impossible. You will curse and scream and wish to god you could hack off parts of your hands. If you see a young child wandering around forget about child labor laws and just bribe the kid to put them in for you. Candy should do the trick