Originally Posted by
Wiggles_dad
I'm not going for lower gearing but to optimize my gearing for a better shift pattern and better chain line. I'm trying to achieve a 46/40/30 or 46/40/26 gearing so that I can have true crossover gearing for my outer and middle rings. This would allow me to avoid double shifting since I like to use down tube shifters. Do you think an Ultegra 6800 double front derailleur would be compatible with this gearing?
No, it wouldn't work any better. You have the same problem that the inner cage plate won't clear the middle chainring unless it's installed too high. These derailleurs are designed for at least 10 tooth differences (52/42) in the chainrings and often 11T (50/39) or 14T (53/39) or more.