Thanks for the replies. Unfortunately I am 100% Mac so the program wont run on my computer. I should have no problem drilling small holes as I've been doing it since I was 15 building scale models out of brass, the smallest hole I regularly drill in 30 thou brass for my model work is 0.34mm (.0135") As best I can measure the pinhole to film distance on my 67 is 55mm (approx 2 1/4 inches)