Literally just finished this, thanks for the DIY. Absolutely the hardest part was getting the FZD out and I've been working on cars for 30 odd years....I went with the small screwdriver method along with some plastic prybars (a must have when working on interiors IMO).
Just a note : my retrofit kit GR/VI wire was more of a light blue/violet. I just did a process of elimination with the other wires.
Happy to not have an opener on my visor anymore, Homelink was one of the options I wanted when looking for a car but choices were limited for Crimson Red unfortunately.
Only other thing I would add is definitely buy it from Tischer, I bought my kit locally and they charged substantially more (I should have asked, I just ordered it).
08 335xi, AT, Cobb AP - Custom Tuned by EFILogics
2000 Mustang GT 631rwhp/655rwtq...the show car