Since there is ambiguity surrounding the original Greek words and the dearth of extant texts (made worse, as you point out, by rival misinterpretations and the undue acceptance of these) it would seem that the best clarification of pleasure would be in outline form that builds up to a precise explanation.
I'm time crunched at the moment, but post #13 would be a piece of that: relating pleasure to the doctrines of desire and to modern understanding as well as to the extant texts. Having a document showing how the pieces fit together in the comprehensive philosophy, but focusing on the ethics of pleasure to present a logical argument.