I too , was totally shocked by the change the flats made in the fundamental tonal characteristics of both my Stingray and Sterling. As well as ...."Me ? Flats?.. Never !!!" Guess that never just got here... Go figure!!!!
Yeah, it's weird. The only time I've tried flats in my 30+ year career as a bassist has been on Fenders and on a Pedulla Pentabuzz. Didn't like 'em. But something about the combination of the pure fundamental and somewhat restrained upper harmonic register of Chromes with the active mayhem of EBMMs seems to work in an odd and very pleasing way. I've never felt more in control of my Sterling (a difficult beast to tame).