Sorry, but you always forget to examine all the issues for jumping freely from Physics to Canon and to Ethics and vice versa. These three are firmly bonded and united and of course they are such, for the achievement of the goal of pleasure.
We are not idealists that made all the ideas as a system/frame with steady idealistic/imagined pictures of their minds that are the root of all -ISMS. And may this of my insistence will be proved one day. And if Dewitt would be here to realize how things are going, would understand what I mean and maybe he will change his mind for being agreed on that issue. I beg you for so many times to not call Epicurean Philosophy as Epicurean-ism, Physics, Canon, and Ethics can't be systematized since no one is able to close the whole Nature in a box and in a frame with imagined pictures that exist in the minds of people - and are also steady and without motion.
We epicureans do speak for atoms and fields that have energy, and are doing all the motions and swerves, as well as, the Nature of All Things are developing and evolving without end. We speak for constant measurement through the Canon and then we unite the Ethics with the Canon and Physics. For what is in our times our natural and necessary won't be the same in the era of Epicurus. Epicurus will be found many things that are useful today as his natural and necessary too i.e. the electricity power, the internet and so many discoveries.
Thus, this is our philosophy and please give its place in the 21st century that follows that many other discoveries will be done and the right philosophy is needed to many persons that are like-minded with us. I do not know how else to convince you on this issue.