Not quite the same, but I did this with a jigsaw:

http://tubaneil.googlepages.com/RadHoleCut-outMarks.jpg/RadHoleCut-outMarks-full;init:.jpg

http://tubaneil.googlepages.com/RadHoleCut-out.jpg/RadHoleCut-out-full;init:.jpg

I second the motion for jigsaw. I used a higher count "metal" blade.

Cheers,

Neil.

On Fri, Aug 8, 2008 at 3:16 AM, craig cowan <phishman068@gmail.com> wrote:
> I'm at the point where i will son be cutting the hole for the fridge flu,
> and wondering "How they did that"?
> I was always under the impression it was a round hole.......it is however,
> far from it. So what's the best method of cutting it accurately?
> It's probably too thick for tin snips, a sawzaw would be too rough, a series
> of hole saws could get you close, there must be a trick.
>
> What have people done!?!?
>
> -Craig
> '85GL (Half Westy)
> '80Westy (Half rust)
>