A minor curiosity;
It appears that Galen wrote several treatise's on Epicurus (almost certainly lost).
Perhaps Don can help with these. I read it (badly) as;
XVI. On the philosophy of Epicurus [anekonta?]
On Epicurus' Eudaimonia and the Happiness of Life
two: On Epicurus [?] Pleasure: [can't make anything of this...something about making and pleasure and imperfection]
On Choosing Pleasure: [?] The usefulness of Physiology in Moral Philosophy
On the (seven books? of the) Sophists
Metrodorus: Epistle to Celsus the Epicurean: Epistle to Pudentianus the Epicurean.