I've been neglecting it, but I have been wanting to try this. It would greatly improve productivity. Now if I could just figure out a way to cut my frame making time by three.
Greasemonkeyredneck,
When stack cutting, I always cut 4 to 5 pieces at a time. I find that by doing this, if the project has a high level of detail, then if something happens to either the top or bottom piece, then I will usually have 3 to 4 pieces which have stayed intack. I use 1/8" oak vaneer ply for the majority of my portrait cuttings. The stack prep is very important. I will clamp one edge of the stack together to remove any gaps and use enough tape to securely hold the stack together. I will then move onto the next edge and so on till it is properly secured. Having the drill bit as mentioned perfectly verticle as well is very important. The best part about stack cutting is the results of the duplication.
Best of luck and let us know how it turns out.
Ron