Originally Posted by fix
LoFarkas' disc hub cog thread was awesome. Throw that in there.
I think I tried the same thing.
It helps to use a piece of PVC pipe (or anything round) the same diameter as the inside of the splines, so you can slot the rotor and cog on to mark the hole positions. Make sure to use a good drill bit (I broke a couple, they were dead cheap crappy ones) otherwise you'll be there forever. I found it best to drill one hole, bolt it to the hub, then drill the other 5. Dead easy to do (and it was cheaper than buying a new hub).
It is easier with a loose ball hub, because the axles are easier to get. Otherwise, get some machined for cartridge, but the cost of that defeats the purpose.