Lightened flywheel to lighter flywheel?

My seat-of-the-pants empiricism tells me that I probably couldn't tell a 2 lb difference in flywheel weight in two similarly built Alfa engines.. When we built my 2 liter that's in my Super, I chose a purpose-built AH lightwight steel flywheel @ 13.4lbs. It's a nice piece of kit, came with a new fitted ring-gear and fit perfectly. Is it "better" than a professionally lightened stock flywheel like Richard's? Probably not. (It's also worth noting that there are lots of full-tilt Alfa race-cars running properly lightened stock flywheels.) I don't think I've ever driven a stock 105 Alfa with a light flywheel so perhsps others can comment on that experience. What really counts, IMHO, is building a 105 motor with a fully balanced---crank, rods, front-pulley, pistons, light flywheel, clutch---bottom end. You'll often hear arguments that this is overkill on a street-driven Alfa motor but, following David Vizard's long ago advice, I've found that the discernable tactile difference between stock and balanced is what makes runs through the Hill Country just that much more enjoyable.