Here's a method for drawing a pseudo ellipse using a cheap CAD program,
or compass and straight edge.
http://tinyurl.com/yejlsy3


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Regards, Gary Wooding
(To reply by email, change gug to goog in my address)

Tim Wescott wrote:
...snip

The immediate problem is for making pseudo-ellipsis in a cheap CAD
program (Qcad), so one could even restrict the two 'master' circles to
being the same diameter. But there are times when I'd like to use
different sized circles for this (imagine a triangle with rounded
corners, and 'puffy cheeks').