Thanks.
What would be better to cut the holes with, flat wood drill bit or the circular hole saw?
If you end up using a flat bit, drill until the center part of the bit pokes through and then drill from the other side.
The edges on the surfaces will come out clean that way instead of chipping on the backside.
I also do this when using hole saws, but it isn't as necessary as long as you aren't pushing with much force.