So, guys, the only reason I mentioned a square hole is that I've been using a dremel in the past and I needed square holes back then smile . In this case, as soon as you mentioned a round hole (which makes perfect sense, of course), I thought of a simple hole saw, like this:

http://www.amazon.it/Sourcingmap-a121205...zza+per+metallo

Does it make sense, or am I making it all too easy? smile
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= Taym =
MK2a #040103216 * 100Gb *All/Colors* Radio * 3.0a11 * Hijack = taympeg