On Mon, 23 Jan 2006 16:16:49 -0800, "Steve B"
wrote:

is there an easy way to accurately cut it?

Use snips. Get a brand new pair of jeweller's snips (Wiss G10s) with a
nice tight rivet and well set blades, and don't use them for anything
else.

The "ridge" is caused by the metal being folded over into the gap
between the blades. Reduce the gap, reduce the ridge.