drilling
I think I am the one bubba is speaking of. I use a vac system and I drill holes from both sides of the board and meet half way though the board. Actually I drill past center from both sides. I can tell you this, your holes and traces always look perfectly aligned this way, but if there is any error the hole will be smaller than the drill by the amount your off target.
It has been working well for me, but it sounds like your drill bit is dull and you might remedy the problem with a sharp drill rather than going to the extra effort of drilling from both sides.
My tooling allows me to change tools without needing to measure the length each time so this helps make the process i use less frustrating.
Andrew Abken
www.drewtronics.net - PCB Cutters