Mal,
And anyone else who might be interested. I use disposable molds big enough for two blanks. I heat my resin and pour about 1/4" into mold. I let this set up and harden 12 hours. I print on address labels, adhere them to brass tube, fill tube with shot, plug both ends with rubber plugs, place on top of hardened resin and pour heated resin over them, watch for bubbles and gently remove them with small wooden skewer, then let sit overnight.
This is not as difficult as it might seem. This method is good for a small quantity of blanks. If I were doing a lot I would probably pop for a pressure pot system. Good luck.
Ben