I've stumbled in to my first problem... When i select the front face and i click extrude nothing hapens... the face just deselects itself
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Extrude problem fixed itself... it just worked again after selecting and deselecting a few things :s

now i've made basic Drives, the 2 upper drives are going to be CD/DVD drives, the one below the dvd's is a fancontroller and the bottom is going to be a pannel with knobs for my UV's inside the case...



How do i make a round face inside and excisting face to extrude a circle from it ?