I just cracked and cut out an UNC 76 like and 72s from the opg. I must say it hurt and felt I had somehow destroyed history. They are both going in my Ike Dansco album.
For the Gov polycarbonate cases, I have alwyas used a Dremmel tool with a very samll cutting wheel to start a slot. Then I use a rubber hammer and a wedge to get the case to split. No hassel, no damage....no hurt!! RickieB