Mike Horvath <mik### [at] gmailcom> wrote:

> Maybe you could use my updated screen.inc to calculate the area? I
> posted it in p.t.s-f just now.

Yes, thanks, Mike.
That was on my list of things to look into.

First, of course, was brute force trying to crack this nut with my hard, thick,
skull - I being an Aries and all   ;)   :D

Gonna be busy for the next week or so, but maybe I'll have a chance to work
through it and have some sort of epiphany.
I already suspect I'm basing my approach on a vertical aperture rather than a
horizontal one, but that ought to be corrected easily enough.

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