Same here also tok about the same time maybe 25 minutes. Only took that long because I did it while watching the Geissele Super SCAR video and doing along with the guy doing the installation. Bill Geissele's video is not the best one look at. Look at a few of them and decide which shows the installation best for you.Geisselle, short very light 1st stage, extremely crisp and light 2nd stage, took me 30 minutes to install but only because the return spring for the trigger kept slipping on me. I believe the Timney is a drop in replacement module like their AR triggers are.