Thanks, buddy.
I also have maintained what most people would consider a large chest without killing myself on the flat bench. Nowdays I am happy with getting good quality reps and switching up my chest workouts pretty frequently as well as super-setting… basically forcing as much blood in as possible, using more of a high intensity workout rather than just putting up 1 or a couple reps of heavy weight on the flat bench and then resting for several minutes in between sets.