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Step 4Making holes for the buttons and USB thingy
Fairly easy, just mark out and drill (I did the marks on the edges so as not to get pen on the lovely shiney outer surface). It seemed best to make a hole in the middle and then work one's way out, continually testing.
Once the USB head fit (with a little more sanding to the board) the buttons were a little more tricky. The tact buttons had little plastic silver buttons over them on the original player, which I kept, but there was no way the grid thing that held them would fit in here. I decided to cut each button out of the grid, and then sand down the back of them until they were a silvery grey lump. I then very carefully cut a rim to the holes I'd made for them, so that when they were inserted they were flush on the inside. I could then fit the circuit in without any more wiggling than before, and the buttons still had a nice feel to them.
Once the USB head fit (with a little more sanding to the board) the buttons were a little more tricky. The tact buttons had little plastic silver buttons over them on the original player, which I kept, but there was no way the grid thing that held them would fit in here. I decided to cut each button out of the grid, and then sand down the back of them until they were a silvery grey lump. I then very carefully cut a rim to the holes I'd made for them, so that when they were inserted they were flush on the inside. I could then fit the circuit in without any more wiggling than before, and the buttons still had a nice feel to them.
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