Thanks all. Time to get a dremel and see what all the fuss is about.
Quick question, is this for aesthetic or practical reasons? Safety-wise, a little extra room is a good idea.
If you do use a rotary burr, try to get a fine one as opposed to coarse, takes longer to remove material but less prone to jumping and "chattering".
@Hovis started
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Thanks all. Time to get a dremel and see what all the fuss is about.