i bought these for $20 USD total. the led fan had 3 pins and a 3 to 4 pin adapter. the pci blower was just a 4 pin.
heres the final hole. its not pretty, but its nice and smooth and will look better once i put a grille on.
the attached fan from the backside of the panel
the semifinal product, all i need now is a grill to protect my fingers.
and i also need to smooth out the square, i did this all with a drill, pliers, and a circular grinding stone drill bit. i will borrow my friends dremel. if you want more info pm me.