Greg Guarino wrote:

Any suggestions would be welcome. As an aside, does Sketchup always make
circles as such visibly-obvious polygons?

Nope, not if you know how to use the "divide" function in the context menu:

http://help.sketchup.com/en/article/114015

Caveat: the smoother the circle (the more segments) the more CPU cycles it
to takes to render, so a model full of smooth circles, curves, etc can slow
down a marginal system.

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