750 Edelbrock issue

I do not understand how Edel arrived at the 7/16" float setting. The Edel AFB body casting is the same basic casting as the Carter AFB, yet some AFBs had float settings as high as 3/16". Which makes the Edel setting a full 1/4" lower & that is huge with float settings; plus, the E carbs use the tiny 0.0935" n/s, which keeps the fuel level even lower. I often wonder how many 750/800 Edel AFB/AVS carbs that performed poorly on the top end was simply because of insufficient fuel supply.