Wed Aug 16, 2006 12:59 am
Assuming you don't have any expensive tools avalible such as drill presses...
Use a compas (the kind used for drawing, not a magnetic one) to draw a perfect 3" circle on the PVC sheet. Actually, make the circle 1/10th of an inch bigger than 3", to give you room to play with. Then go over that line with a razor blade, a little bit deeper each time, until you have it cut. Then use a file or sand paper to sand it down to exact size, and smooth the edges.
Peace,
Pete Zaria.