[jnev]

I just used tape to cover the holes. All I did was use a dremel and hold the shaft with pliers just in case. The pliers really weren't needed because when I grinded down the shaft, I was grinding at a 90 degree angle to the shaft. So the bit was always spinning at or away from the front of the can, not side to side.

Hopefully you understand, my writing may be a little confusing.