I've just received this collection of essays, published in February, with an excellent paper concerning the size of the sun by one T.H.M. Gellar-Goad.
I may attempt an outline; in the meantime, here's a good bit toward the end;
By staking out a stance of aporia conditioned by sense-perception and reasoning thereupon, the Epicureans did in fact prove to be less wrong than everyone else [...] Epicurus and his school, in avoiding a concrete statement of the sun's size, avoided being concretely wrong, in contrast to Eudoxus and all the rest.
aporia; doubt, or a difficulty in resolving the available data into established truth.
The author is thoroughly familiar with Epicurean epistemology, and explores the question not on its face, but based on a careful understanding of the whole philosophy. I thought it was very well done.
If you can find a library copy, or get online access through an institution, you'll save a bit of coin--but it will be good to have read this as we move into the Letter to Pythocles on the podcast.