The general process here is to make a rough cut with a die grinder or some sort of
similar tool. Because these deform the skin somewhat, it's a good idea to not
get to close to the edge.
Hence, even after this step, there's still lots of cleanup work to be done. The
general process that we followed was
- Cut it with the die grinder for a rough cut.
- Cut it with snips - you can get pretty close with these.
- Use various and sundry files to get everything smooth and the corners the right shape.
- Scotchbrite stuff to clean it up and deburr it.
This seemed to work pretty well. Most folks that do this have a dremel tool - we didn't,
and I think we managed okay without one. It would make things easier but isn't strictly
necessary.
One final piece of advice - measure everything a couple times, here. Then measure it
again. After you start cutting, that's where your landing light is going. If you put
in the wrong place, there's not really a way to fix it, so be careful.
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