440 crank

I always wondered about knife-edging... supposed to make the leading edge slip through the oil mist easier or something. Does it actually show measurable benefits on a dyno?

Notice that all low-drag airplane leading edges are not knives, but round and blunt in the front, with a long tapered trailing surface. Has anyone machined a crank that way instead?

Anyhow, for my 451 (KB 280 pistons which are fairly light, and Eagle rods) they took .120 off my steel 440 crank and it did need some heavy metal to balance. Don't remember what the parts or bobweights were though.