Carbide feed and speed

FWIW, I’ve been trying to wrap my mind around this and have been working out my ignorance in public at:

I think this is a pretty cool representation of the official feeds and speeds though:

https://public.tableau.com/profile/willadams#!/vizhome/Carbide3DCNCFeedsandSpeeds/Sheet1?publish=yes

(and really need to get at least 1/8" endmills in a Shapeoko added somehow)