drilling out lugs from hub, disc brake upgrade

This thread has me confused, maybe its just the varying direction descriptions that messed me up. Is there a difference in opinion on which direction the studs should be knocked out?

I would be interested in a step by step on how to remove the studs in the setup in the second picture of post 26 above (the complete KH disc hub and rotor)? I have a 4 inch angle grinder, Makita cordless drills, and several big hammers and punches - what other tool(s) would I need?