> > How do you drill oval holes?  :-)

Tch tch tch, dear oh dear, it's simple as. Just use an oval bit

But if that's a serious question - my (and probably every other)
board house can route whatever size/shape hole/perimeter you
instruct them to. Through Eagle or otherwise

> Try drilling at an non-90-degrees agle to the PCB plane?
> 
> (Afterthought: do you English use degrees at all? If so should I
> convert to Farenheit first?)

Nah, don't worry about it. We just guess and make crude pencil
drawings with no units at all

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