The article "Major Issues in Understanding Epicurean Philosophy" is the subject of a pinned post in the General Discussion forum. Comments about that article can be posted there, or threads to discuss detailed aspects can be started in this sub-forum.
Please note that the chart itself has links to a location to discuss each point of the chart. In many cases, those points are so important that they have their own forums devoted to their discussion, so if possible, please use the link under each item to go to the right place for posting.
But don't worry if you get lost in the links -- feel free to post here and we can move the thread to another place later if needed.